double RadarGroundMap::ComputeXv(SpiceDouble X[3]) {
// Get the spacecraft position (Xsc) and velocity (Vsc) in body fixed
// coordinates
SpiceRotation *bodyFrame = p_camera->BodyRotation();
SpicePosition *spaceCraft = p_camera->InstrumentPosition();
std::vector<double> Ssc(6);
// Load the state into Ssc
vequ_c ( (SpiceDouble *) &(spaceCraft->Coordinate()[0]), &Ssc[0]);
vequ_c ( (SpiceDouble *) &(spaceCraft->Velocity()[0]), &Ssc[3]);
// Rotate the state to body-fixed
std::vector<double> bfSsc(6);
bfSsc = bodyFrame->ReferenceVector(Ssc);
// Extract the body-fixed position and velocity
std::vector<double> Vsc(3);
std::vector<double> Xsc(3);
vequ_c ( &bfSsc[0], &Xsc[0] );
vequ_c ( &bfSsc[3], &Vsc[0] );
// Compute the slant range
SpiceDouble lookB[3];
vsub_c(&Xsc[0],X,lookB);
p_slantRange = vnorm_c(lookB);
// Compute and return xv
double xv = -2.0 * vdot_c(lookB,&Vsc[0]) / (vnorm_c(lookB) * p_waveLength);
return xv;
}
/** Compute undistorted focal plane coordinate from ground position using current Spice from SetImage call
*
* This method will compute the undistorted focal plane coordinate for
* a ground position, using the current Spice settings (time and kernels)
* without resetting the current point values for lat/lon/radius/x/y.
*
* @param lat planetocentric latitude in degrees
* @param lon planetocentric longitude in degrees
* @param radius local radius in m
*
* @return conversion was successful
*/
bool CameraGroundMap::GetXY(const double lat, const double lon, const double radius,
std::vector<double> &lookJ) {
// Check for Sky images
if ( p_camera->IsSky() ) {
return false;
}
// Should a check be added to make sure SetImage has been called???
// Compute the look vector in body-fixed coordinates
double pB[3]; // Point on surface
latrec_c( radius/1000.0, lon*Isis::PI/180.0, lat*Isis::PI/180.0, pB);
// Get spacecraft vector in body-fixed coordinates
SpiceRotation *bodyRot = p_camera->BodyRotation();
std::vector<double> sB = bodyRot->ReferenceVector(p_camera->InstrumentPosition()->Coordinate());
std::vector<double> lookB(3);
for (int ic=0; ic<3; ic++) lookB[ic] = pB[ic] - sB[ic];
// Check for point on back of planet by checking to see if surface point is viewable (test emission angle)
// During iterations, we may not want to do the back of planet test???
double upsB[3],upB[3],dist;
vminus_c ( (SpiceDouble *) &lookB[0], upsB);
unorm_c (upsB, upsB, &dist);
unorm_c (pB, upB, &dist);
double angle = vdot_c(upB, upsB);
double emission;
if (angle > 1) {
emission = 0;
}
else if (angle < -1) {
emission = 180.;
}
else {
emission = acos (angle) * 180.0 / Isis::PI;
}
if (fabs(emission) > 90.) return false;
// Get the look vector in the camera frame and the instrument rotation
lookJ.resize(3);
lookJ = p_camera->BodyRotation()->J2000Vector( lookB );
return true;
}
/** Compute ground position from slant range
*
* @param ux Slant range distance
* @param uy Doppler shift (always 0.0)
* @param uz Not used
*
* @return conversion was successful
*/
bool RadarGroundMap::SetFocalPlane(const double ux, const double uy,
double uz) {
SpiceRotation *bodyFrame = p_camera->BodyRotation();
SpicePosition *spaceCraft = p_camera->InstrumentPosition();
// Get spacecraft position and velocity to create a state vector
std::vector<double> Ssc(6);
// Load the state into Ssc
vequ_c ( (SpiceDouble *) &(spaceCraft->Coordinate()[0]), &Ssc[0]);
vequ_c ( (SpiceDouble *) &(spaceCraft->Velocity()[0]), &Ssc[3]);
// Rotate state vector to body-fixed
std::vector<double> bfSsc(6);
bfSsc = bodyFrame->ReferenceVector(Ssc);
// Extract body-fixed position and velocity
std::vector<double> Vsc(3);
std::vector<double> Xsc(3);
vequ_c ( &bfSsc[0], (SpiceDouble *) &(Xsc[0]) );
vequ_c ( &bfSsc[3], (SpiceDouble *) &(Vsc[0]) );
// Compute intrack, crosstrack, and radial coordinate
SpiceDouble i[3];
vhat_c (&Vsc[0],i);
SpiceDouble c[3];
SpiceDouble dp;
dp = vdot_c(&Xsc[0],i);
SpiceDouble p[3],q[3];
vscl_c(dp,i,p);
vsub_c(&Xsc[0],p,q);
vhat_c(q,c);
SpiceDouble r[3];
vcrss_c(i,c,r);
// What is the initial guess for R
double radii[3];
p_camera->Radii(radii);
SpiceDouble R = radii[0];
SpiceDouble lastR = DBL_MAX;
SpiceDouble rlat;
SpiceDouble rlon;
SpiceDouble lat = DBL_MAX;
SpiceDouble lon = DBL_MAX;
double slantRangeSqr = (ux * p_rangeSigma) / 1000.;
slantRangeSqr = slantRangeSqr*slantRangeSqr;
SpiceDouble X[3];
int iter = 0;
do {
double normXsc = vnorm_c(&Xsc[0]);
double alpha = (R*R - slantRangeSqr - normXsc*normXsc) /
(2.0 * vdot_c(&Xsc[0],c));
double arg = slantRangeSqr - alpha*alpha;
if (arg < 0.0) return false;
double beta = sqrt(arg);
if (p_lookDirection == Radar::Left) beta *= -1.0;
SpiceDouble alphac[3],betar[3];
vscl_c(alpha,c,alphac);
vscl_c(beta,r,betar);
vadd_c(alphac,betar,alphac);
vadd_c(&Xsc[0],alphac,X);
// Convert X to lat,lon
lastR = R;
reclat_c(X,&R,&lon,&lat);
rlat = lat*180.0/Isis::PI;
rlon = lon*180.0/Isis::PI;
R = GetRadius(rlat,rlon);
iter++;
}
while (fabs(R-lastR) > p_tolerance && iter < 30);
if (fabs(R-lastR) > p_tolerance) return false;
lat = lat*180.0/Isis::PI;
lon = lon*180.0/Isis::PI;
while (lon < 0.0) lon += 360.0;
// Compute body fixed look direction
std::vector<double> lookB;
lookB.resize(3);
lookB[0] = X[0] - Xsc[0];
lookB[1] = X[1] - Xsc[1];
lookB[2] = X[2] - Xsc[2];
std::vector<double> lookJ = bodyFrame->J2000Vector(lookB);
SpiceRotation *cameraFrame = p_camera->InstrumentRotation();
std::vector<double> lookC = cameraFrame->ReferenceVector(lookJ);
SpiceDouble unitLookC[3];
vhat_c(&lookC[0],unitLookC);
p_camera->SetLookDirection(unitLookC);
return p_camera->Sensor::SetUniversalGround(lat,lon);
}
/** Compute undistorted focal plane coordinate from ground position that includes a local radius
*
* @param lat planetocentric latitude in degrees
* @param lon planetocentric longitude in degrees
* @param radius local radius in meters
*
* @return conversion was successful
*/
bool RadarGroundMap::SetGround(const double lat, const double lon, const double radius) {
// Get the ground point in rectangular coordinates (X)
SpiceDouble X[3];
SpiceDouble rlat = lat*Isis::PI/180.0;
SpiceDouble rlon = lon*Isis::PI/180.0;
latrec_c(radius,rlon,rlat,X);
// Compute lower bound for Doppler shift
double et1 = p_camera->Spice::CacheStartTime();
p_camera->Sensor::SetEphemerisTime(et1);
double xv1 = ComputeXv(X);
// Compute upper bound for Doppler shift
double et2 = p_camera->Spice::CacheEndTime();
p_camera->Sensor::SetEphemerisTime(et2);
double xv2 = ComputeXv(X);
// Make sure we bound root (xv = 0.0)
if ((xv1 < 0.0) && (xv2 < 0.0)) return false;
if ((xv1 > 0.0) && (xv2 > 0.0)) return false;
// Order the bounds
double fl,fh,xl,xh;
if (xv1 < xv2) {
fl = xv1;
fh = xv2;
xl = et1;
xh = et2;
}
else {
fl = xv2;
fh = xv1;
xl = et2;
xh = et1;
}
// Iterate a max of 30 times
for (int j=0; j<30; j++) {
// Use the secant method to guess the next et
double etGuess = xl + (xh - xl) * fl / (fl - fh);
// Compute the guessed Doppler shift. Hopefully
// this guess converges to zero at some point
p_camera->Sensor::SetEphemerisTime(etGuess);
double fGuess = ComputeXv(X);
// Update the bounds
double delTime;
if (fGuess < 0.0) {
delTime = xl - etGuess;
xl = etGuess;
fl = fGuess;
}
else {
delTime = xh - etGuess;
xh = etGuess;
fh = fGuess;
}
// See if we are done
if ((fabs(delTime) <= p_timeTolerance) || (fGuess == 0.0)) {
SpiceRotation *bodyFrame = p_camera->BodyRotation();
SpicePosition *spaceCraft = p_camera->InstrumentPosition();
// Get body fixed spacecraft velocity and position
std::vector<double> Ssc(6);
// Load the state into Ssc and rotate to body-fixed
vequ_c ( (SpiceDouble *) &(spaceCraft->Coordinate()[0]), &Ssc[0]);
vequ_c ( (SpiceDouble *) &(spaceCraft->Velocity()[0]), &Ssc[3]);
std::vector<double> bfSsc(6);
bfSsc = bodyFrame->ReferenceVector(Ssc);
// Extract the body-fixed position and velocity from the state
std::vector<double> Vsc(3);
std::vector<double> Xsc(3);
vequ_c ( &bfSsc[0], (SpiceDouble *) &(Xsc[0]) );
vequ_c ( &bfSsc[3], (SpiceDouble *) &(Vsc[0]) );
// Determine if focal plane coordinate falls on the correct side of the
// spacecraft. Radar has both left and right look directions. Make sure
// the coordinate is on the same side as the look direction. This is done
// by (X - S) . (V x S) where X=ground point vector, S=spacecraft position
// vector, and V=velocity vector. If the dot product is greater than 0, then
// the point is on the right side. If the dot product is less than 0, then
// the point is on the left side. If the dot product is 0, then the point is
// directly under the spacecraft (neither left or right) and is invalid.
SpiceDouble vout1[3];
SpiceDouble vout2[3];
SpiceDouble dp;
vsub_c(X,&Xsc[0],vout1);
vcrss_c(&Vsc[0],&Xsc[0],vout2);
dp = vdot_c(vout1,vout2);
if (dp > 0.0 && p_lookDirection == Radar::Left) return false;
if (dp < 0.0 && p_lookDirection == Radar::Right) return false;
if (dp == 0.0) return false;
// Compute body fixed look direction
std::vector<double> lookB;
lookB.resize(3);
lookB[0] = X[0] - Xsc[0];
lookB[1] = X[1] - Xsc[1];
lookB[2] = X[2] - Xsc[2];
std::vector<double> lookJ = bodyFrame->J2000Vector(lookB);
SpiceRotation *cameraFrame = p_camera->InstrumentRotation();
std::vector<double> lookC = cameraFrame->ReferenceVector(lookJ);
SpiceDouble unitLookC[3];
vhat_c(&lookC[0],unitLookC);
p_camera->SetLookDirection(unitLookC);
p_camera->SetFocalLength(p_slantRange*1000.0);
p_focalPlaneX = p_slantRange / p_rangeSigma;
p_focalPlaneY = 0.0;
return true;
}
}
return false;
}
void IsisMain() {
// Use a regular Process
Process p;
// Get user parameters and error check
UserInterface &ui = Application::GetUserInterface();
QString from = ui.GetFileName("FROM");
QString to = FileName(ui.GetFileName("TO")).expanded();
//TO DO: UNCOMMENT THIS LINE ONCE HRSC IS WORKING IN SS
// double HRSCNadirCenterTime = ui.GetDouble("HRSC_NADIRCENTERTIME");
// Open input cube and Make sure this is a lev1 image (ie, not map projected)
Cube cube;
cube.open(from);
if (cube.isProjected()) {
QString msg = "Input images is a map projected cube ... not a level 1 image";
throw IException(IException::User, msg, _FILEINFO_);
}
// Initialize the camera
Cube *input = p.SetInputCube("FROM");
Pvl *cubeHeader = input->label();
Camera *cam = input->camera();
CameraDetectorMap *detectorMap = cam->DetectorMap();
CameraFocalPlaneMap *focalMap = cam->FocalPlaneMap();
CameraDistortionMap *distortionMap = cam->DistortionMap();
CameraGroundMap *groundMap = cam->GroundMap();
// Make sure the image contains the InstrumentPointing (aka CK) blob/table
PvlGroup test = cube.label()->findGroup("Kernels", Pvl::Traverse);
QString InstrumentPointing = (QString) test["InstrumentPointing"];
if (InstrumentPointing != "Table") {
QString msg = "Input image does not contain needed SPICE blobs...run spiceinit with attach=yes.";
throw IException(IException::User, msg, _FILEINFO_);
}
// Open output line scanner keyword file
ofstream toStrm;
toStrm.open(to.toAscii().data(), ios::trunc);
if (toStrm.bad()) {
QString msg = "Unable to open output TO file";
throw IException(IException::User, msg, _FILEINFO_);
}
// Get required keywords from instrument and band groups
PvlGroup inst = cube.label()->findGroup("Instrument", Pvl::Traverse);
QString instrumentId = (QString) inst["InstrumentId"];
bool isMocNA = false;
//TO DO: UNCOMMENT THIS LINES ONCE MOC IS WORKING IN SS
// bool isMocWARed = false;
bool isHiRise = false;
bool isCTX = false;
bool isLroNACL = false;
bool isLroNACR = false;
bool isHRSC = false;
//TO DO: UNCOMMENT THESE LINE ONCE MOC IS WORKING IN SS
// if (instrumentId == "MOC") {
// PvlGroup band = cube.label()->findGroup("BandBin", Pvl::Traverse);
// QString filter = (QString) band["FilterName"];
//
// if (strcmp(filter.toAscii().data(), "BROAD_BAND") == 0)
// isMocNA = true;
// else if (strcmp(filter.toAscii().data(), "RED") == 0)
// isMocWARed = true;
// else if (strcmp(filter.toAscii().data(), "BLUE") == 0) {
// QString msg = "MOC WA Blue filter images not supported for Socet Set mapping";
// throw IException(IException::User, msg, _FILEINFO_);
// }
// }
// else if (instrumentId == "IdealCamera") {
//TO DO: DELETE THIS LINE ONCE MOC IS WORKING IN SS
if (instrumentId == "IdealCamera") {
PvlGroup orig = cube.label()->findGroup("OriginalInstrument", Pvl::Traverse);
QString origInstrumentId = (QString) orig["InstrumentId"];
if (origInstrumentId == "HIRISE") {
isHiRise = true;
}
else {
QString msg = "Unsupported instrument: " + origInstrumentId;
throw IException(IException::User, msg, _FILEINFO_);
}
}
else if (instrumentId == "HIRISE") {
isHiRise = true;
}
else if (instrumentId == "CTX") {
isCTX = true;
}
else if (instrumentId == "NACL") {
isLroNACL = true;
}
else if (instrumentId == "NACR") {
isLroNACR = true;
}
//TO DO: UNCOMMENT THIS LINE ONCE HRSC IS WORKING IN SS
// else if (instrumentId == "HRSC") isHRSC = true;
else {
QString msg = "Unsupported instrument: " + instrumentId;
throw IException(IException::User, msg, _FILEINFO_);
}
int ikCode = cam->naifIkCode();
// Get Focal Length.
// NOTE:
// For MOC Wide Angle, cam->focal_length returns the focal length
// in pixels, so we must convert from pixels to mm using the PIXEL_SIZE
// of 0.007 mm gotten from $ISIS3DATA/mgs/kernels/ik/moc20.ti. (The
// PIXEL_PITCH value gotten from cam->PixelPitch is 1.0 since the
// focal length used by ISIS in this case is in pixels)
// For reference: the MOC WA blue filter pixel size needs an adjustment
// of 1.000452 (see p_scale in MocWideAngleDistortionMap.cpp), so that
// the final blue filter pixel size = (0.007 / 1.000452)
//
// For all other cameras, cam->focal_length returns the focal
// length in mm, as needed by Socet Set
double focal = cam->FocalLength(); // focal length returned in mm
//TO DO: UNCOMMENT THESE LINES ONCE HRSC and MOC IS WORKING IN SS
// if (isMocWARed)
// focal = focal * 0.007; // pixel to mm conversion
// else if (isHRSC)
// {
// switch (ikCode) {
// case -41219: //S1: fwd stereo
// focal = 184.88;
// break;
// case -41218: //IR: infra-red
// focal = 181.57;
// break;
// case -41217: //P1: fwd photo
// focal = 179.16;
// break;
// case -41216: // GREEN
// focal = 175.31;
// break;
// case -41215: // NADIR
// focal = 175.01;
// break;
// case -41214: // BLUE
// focal = 175.53;
// break;
// case -41213: // P2: aft photo
// focal = 179.19;
// break;
// case -41212: // RED
// focal = 181.77;
// break;
// case -41211: // S2: aft stereo
// focal = 184.88;
// break;
// default:
// break;
// }
// }
// Get instrument summing modes
int csum = (int) detectorMap->SampleScaleFactor();
int dsum = (int) detectorMap->LineScaleFactor();
if (isLroNACL || isLroNACR || isHRSC)
dsum = csum;
// Calculate location of boresight in image space, these are zero-based values
//
// Note: For MOC NA, the boresight is at the image center
// For MOC WA, MRO HiRISE, MRO CTX, LRO_NACL, LRO_NACR and HRSC the
// boresight is not at the detector center, but the boresight is at the
// center of a NOPROJ'ED MRO HIRISE image
// Get line/samp of boresight pixel in detector space (summing == 1)
focalMap->SetFocalPlane(0.0, 0.0);
double detectorBoresightSample = focalMap->DetectorSample();
double detectorBoresightLine = focalMap->DetectorLine();
// Convert sample of boresight pixel in detector into image space
// (summing, etc., is accounted for.)
detectorMap->SetDetector(detectorBoresightSample, detectorBoresightLine);
double boresightSample = detectorMap->ParentSample();
// Set Atmospheric correction coefficients to 0
double atmco[4] = {0.0, 0.0, 0.0, 0.0};
// Get totalLines, totalSamples and account for summed images
int totalLines = cube.lineCount();
int totalSamples = cube.sampleCount();
// Get the Interval Time in seconds and calculate
// scan duration in seconds
double scanDuration = 0.0;
double intTime = 0.0;
//TO DO: UNCOMMENT THESE LINES ONCE HRSC IS WORKING IN SS
// int numIntTimes = 0.0;
// vector<LineRateChange> lineRates;
// if (isHRSC) {
// numIntTimes = GetHRSCLineRates(&cube, lineRates, totalLines, HRSCNadirCenterTime);
// if (numIntTimes == 1) {
// LineRateChange lrc = lineRates.at(0);
// intTime = lrc.GetLineScanRate();
// }
// if (numIntTimes <= 0) {
// QString msg = "HRSC: Invalid number of scan times";
// throw IException(IException::Programmer, msg, _FILEINFO_);
// }
// else
// scanDuration = GetHRSCScanDuration(lineRates, totalLines);
// }
// else {
//
// TO DO: indent the following two lines when HRSC is working in SS
intTime = detectorMap->LineRate(); //LineRate is in seconds
scanDuration = intTime * totalLines;
//TO DO: UNCOMMENT THIS LINE ONCE HRSC IS WORKING IN SS
// }
// For reference, this is the code if calculating interval time
// via LineExposureDuration keyword off image labels:
//
// if (isMocNA || isMocWARed)
// intTime = exposureDuration * (double) dsum / 1000.0;
// else if (isHiRise)
// intTime = exposureDuration * (double) dsum / 1000000.0;
// Get along and cross scan pixel size for NA and WA sensors.
// NOTE:
// 1) The MOC WA pixel size is gotten from moc20.ti and is 7 microns
// HRSC pixel size is from the Instrument Addendum file
// 2) For others, cam->PixelPitch() returns the pixel pitch (size) in mm.
double alongScanPxSize = 0.0;
double crossScanPxSize = 0.0;
//TO DO: UNCOMMENT THESE LINES ONCE MOC IS WORKING IN SS
// if (isMocWARed || isHRSC) {
// alongScanPxSize = csum * 0.007;
// crossScanPxSize = dsum * 0.007;
// }
// else {
//
// TO DO: indent the following 24 lines when HRSC is working in SS
crossScanPxSize = dsum * cam->PixelPitch();
// Get the ephemeris time, ground position and undistorted focal plane X
// coordinate at the center line/samp of image
cam->SetImage(cube.sampleCount() / 2.0, cube.lineCount() / 2.0);
double tMid = cam->time().Et();
const double latCenter = cam->UniversalLatitude();
const double lonCenter = cam->UniversalLongitude();
const double radiusCenter = cam->LocalRadius().meters();
double uXCenter = distortionMap->UndistortedFocalPlaneX();
// from the ground position at the image center, increment the ephemeris
// time by the line rate and map the ground position into the sensor in
// undistorted focal plane coordinates
cam->setTime(iTime(tMid + intTime));
double uX, uY;
groundMap->GetXY(latCenter, lonCenter, radiusCenter, &uX, &uY);
// the along scan pixel size is the difference in focal plane X coordinates
alongScanPxSize = abs(uXCenter - uX);
//TO DO: UNCOMMENT THIS LINE ONCE MOC and HRSC IS WORKING IN SS
// }
// Now that we have totalLines, totalSamples, alongScanPxSize and
// crossScanPxSize, fill the Interior Orientation Coefficient arrays
double ioCoefLine[10];
double ioCoefSample[10];
for (int i = 0; i <= 9; i++) {
ioCoefLine[i] = 0.0;
ioCoefSample[i] = 0.0;
}
ioCoefLine[0] = totalLines / 2.0;
ioCoefLine[1] = 1.0 / alongScanPxSize;
ioCoefSample[0] = totalSamples / 2.0;
ioCoefSample[2] = 1.0 / crossScanPxSize;
// Update the Rectification Terms found in the base sensor class
double rectificationTerms[6];
rectificationTerms[0] = totalLines / 2.0;
rectificationTerms[1] = 0.0;
rectificationTerms[2] = 1.0;
rectificationTerms[3] = totalSamples / 2.0;
rectificationTerms[4] = 1.0;
rectificationTerms[5] = 0.0;
// Fill the triangulation parameters array
double triParams[18];
for (int i = 0; i <= 17; i++)
triParams[i] = 0.0;
triParams[15] = focal;
// Set the Center Ground Point at the SOCET Set image, in radians
double centerGp[3];
double radii[3] = {0.0, 0.0, 0.0};
Distance Dradii[3];
cam->radii(Dradii);
radii[0] = Dradii[0].kilometers();
radii[1] = Dradii[1].kilometers();
radii[2] = Dradii[2].kilometers();
cam->SetImage(boresightSample, totalLines / 2.0);
centerGp[0] = DEG2RAD *
TProjection::ToPlanetographic(cam->UniversalLatitude(), radii[0], radii[2]);
centerGp[1] = DEG2RAD * TProjection::To180Domain(cam->UniversalLongitude());
centerGp[2] = 0.0;
//**** NOTE: in the import_pushbroom SOCET SET program, centerGp[2] will be set to the SS
//**** project's gp_origin_z
// Now get keyword values that depend on ephemeris data.
// First get the ephemeris time and camera Lat Lon at image center line, boresight sample.
double centerLine = double(totalLines) / 2.0;
cam->SetImage(boresightSample, centerLine); //set to boresight of image
double etCenter = cam->time().Et();
// Get the sensor position at the image center in ographic lat,
// +E lon domain 180 coordinates, radians, height in meters
double sensorPosition[3] = {0.0, 0.0, 0.0};
double ocentricLat, e360Lon;
cam->subSpacecraftPoint(ocentricLat, e360Lon);
sensorPosition[0] = DEG2RAD * TProjection::ToPlanetographic(ocentricLat, radii[0], radii[2]);
sensorPosition[1] = DEG2RAD * TProjection::To180Domain(e360Lon);
sensorPosition[2] = cam->SpacecraftAltitude() * 1000.0;
// Build the ephem data. If the image label contains the InstrumentPosition
// table, use it as a guide for number and spacing of Ephem points.
// Otherwise (i.e, for dejittered HiRISE images), the number and spacing of
// ephem points based on hardcoded dtEphem value
// Using the InstrumentPosition table as a guide build the ephem data
QList< QList<double> > ephemPts;
QList< QList<double> > ephemRates;
PvlGroup kernels = cube.label()->findGroup("Kernels", Pvl::Traverse);
QString InstrumentPosition = (QString) kernels["InstrumentPosition"];
int numEphem = 0; // number of ephemeris points
double dtEphem = 0.0; // delta time of ephemeris points, seconds
if (InstrumentPosition == "Table") {
// Labels contain SPK blob
// set up Ephem pts/rates number and spacing
Table tablePosition("InstrumentPosition", cubeHeader->fileName());
numEphem = tablePosition.Records();
// increase the number of ephem nodes by 20%. This is somewhat random but
// generally intended to compensate for having equally time spaced nodes
// instead of of the potentially more efficient placement used by spiceinit
numEphem = int(double(numEphem) * 1.2);
// if numEphem calcutated from SPICE blobs is too sparse for SOCET Set,
// mulitiply it by a factor of 30
// (30X was settled upon emperically. In the future, make this an input parameter)
if (numEphem <= 10) numEphem = tablePosition.Records() * 30;
// make the number of nodes odd
numEphem = (numEphem % 2) == 1 ? numEphem : numEphem + 1;
// SOCET has a max number of ephem pts of 10000, and we're going to add twenty...
if (numEphem > 10000 - 20) numEphem = 9979;
dtEphem = scanDuration / double(numEphem);
//build the tables of values
double et = etCenter - (((numEphem - 1) / 2) * dtEphem);
for (int i = 0; i < numEphem; i++) {
cam->setTime(iTime(et));
SpiceRotation *bodyRot = cam->bodyRotation();
vector<double> pos = bodyRot->ReferenceVector(cam->instrumentPosition()->Coordinate());
//TO DO: UNCOMMENT THE FOLLOWING LINE WHEN VELOCITY BLOBS ARE CORRECT IN ISIS
//vector<double> vel = bodyRot->ReferenceVector(cam->instrumentPosition()->Velocity());
//Add the ephemeris position and velocity to their respective lists, in meters and meters/sec
QList<double> ephemPt;
QList<double> ephemRate;
ephemPts.append(ephemPt << pos[0] * 1000 << pos[1] * 1000 << pos[2] * 1000);
//TO DO: UNCOMMENT THE FOLLOWING LINE WHEN VELOCITY BLOBS ARE CORRECT IN ISIS
//ephemRates.append(ephemRate << vel[0] * 1000 << vel[1] * 1000 << vel[2] * 1000);
et += dtEphem;
}
//TO DO: WHEN VELOCITY BLOBS ARE CORRECT IN ISIS, linearlly interpolate 10 nodes rather than 11
// (need 11 now for computation of velocity at first and last ephemeris point)
// linearlly interpolate 11 additional nodes before line 1 (SOCET requires this)
for (int i = 0; i < 11; i++) {
double vec[3] = {0.0, 0.0, 0.0};
vec[0] = ephemPts[0][0] + (ephemPts[0][0] - ephemPts[1][0]);
vec[1] = ephemPts[0][1] + (ephemPts[0][1] - ephemPts[1][1]);
vec[2] = ephemPts[0][2] + (ephemPts[0][2] - ephemPts[1][2]);
QList<double> ephemPt;
ephemPts.prepend (ephemPt << vec[0] << vec[1] << vec[2]);
//TO DO: UNCOMMENT THE FOLLOWING LINES WHEN VELOCITY BLOBS ARE CORRECT IN ISIS
//vec[0] = ephemRates[0][0] + (ephemRates[0][0] - ephemRates[1][0]);
//vec[1] = ephemRates[0][1] + (ephemRates[0][1] - ephemRates[1][1]);
//vec[2] = ephemRates[0][2] + (ephemRates[0][2] - ephemRates[1][2]);
//QList<double> ephemRate;
//ephemRates.prepend (ephemRate << vec[0] << vec[1] << vec[2]);
}
//TO DO: WHEN VELOCITY BLOBS ARE CORRECT IN ISIS, linearlly interpolate 10 nodes rather than 11
// (need 11 now for computation of velocity at first and last ephemeris point)
// linearlly interpolate 11 additional nodes after the last line (SOCET requires this)
for (int i = 0; i < 11; i++) {
double vec[3] = {0.0, 0.0, 0.0};
int index = ephemPts.size() - 1;
vec[0] = ephemPts[index][0] + (ephemPts[index][0] - ephemPts[index - 1][0]);
vec[1] = ephemPts[index][1] + (ephemPts[index][1] - ephemPts[index - 1][1]);
vec[2] = ephemPts[index][2] + (ephemPts[index][2] - ephemPts[index - 1][2]);
QList<double> ephemPt;
ephemPts.append(ephemPt << vec[0] << vec[1] << vec[2]);
//TO DO: UNCOMMENT THE FOLLOWING LINES WHEN VELOCITY BLOBS ARE CORRECT IN ISIS
//vec[0] = ephemRates[index][0] + (ephemRates[index][0] - ephemRates[index - 1][0]);
//vec[1] = ephemRates[index][1] + (ephemRates[index][1] - ephemRates[index - 1][1]);
//vec[2] = ephemRates[index][2] + (ephemRates[index][2] - ephemRates[index - 1][2]);
//QList<double> ephemRate;
//ephemRates.append(ephemRate << vec[0] << vec[1] << vec[2]);
}
numEphem += 20;
//TO DO: DELETE THE FOLLOWING LINES WHEN VELOCITY BLOBS ARE CORRECT IN ISIS
// Compute the spacecraft velocity at each ephemeris point
double deltaTime = 2.0 * dtEphem;
for (int i = 0; i < numEphem; i++) {
double vec[3] = {0.0, 0.0, 0.0};
vec[0] = (ephemPts[i+2][0] - ephemPts[i][0]) / deltaTime;
vec[1] = (ephemPts[i+2][1] - ephemPts[i][1]) / deltaTime;
vec[2] = (ephemPts[i+2][2] - ephemPts[i][2]) / deltaTime;
QList<double> ephemRate;
ephemRates.append(ephemRate << vec[0] << vec[1] << vec[2]);
}
}
else {
// Calculate the number of ephemeris points that are needed, based on the
// value of dtEphem (Delta-Time-Ephemeris). SOCET SET needs the ephemeris
// points to exceed the image range for interpolation. For now, attempt a
// padding of 10 ephemeris points on either side of the image.
if (isMocNA || isHiRise || isCTX || isLroNACL || isLroNACR || isHRSC)
// Try increment of every 300 image lines
dtEphem = 300 * intTime; // Make this a user definable increment?
else // Set increment for WA images to one second
dtEphem = 1.0;
// Pad by 10 ephem pts on each side of the image
numEphem = (int)(scanDuration / dtEphem) + 20;
// if numEphem is even, make it odd so that the number of ephemeris points
// is equal on either side of T_CENTER
if ((numEphem % 2) == 0)
numEphem++;
//TO DO: DELETE THE FOLLOWING LINE WHEN VELOCITY BLOBS ARE CORRECT IN ISIS
numEphem = numEphem + 2; // Add two for calcuation of velocity vectors...
// Find the ephemeris time for the first ephemeris point, and from that, get
// to_ephem needed by SOCET (to_ephem is relative to etCenter)
double et = etCenter - (((numEphem - 1) / 2) * dtEphem);
for (int i = 0; i < numEphem; i++) {
cam->setTime(iTime(et));
SpiceRotation *bodyRot = cam->bodyRotation();
vector<double> pos = bodyRot->ReferenceVector(cam->instrumentPosition()->Coordinate());
//TO DO: UNCOMMENT THE FOLLOWING LINE WHEN VELOCITY BLOBS ARE CORRECT IN ISIS
//vector<double> vel = bodyRot->ReferenceVector(cam->instrumentPosition()->Velocity());
//Add the ephemeris position and velocity to their respective lists, in meters and meters/sec
QList<double> ephemPt;
QList<double> ephemRate;
ephemPts.append(ephemPt << pos[0] * 1000 << pos[1] * 1000 << pos[2] * 1000);
//TO DO: UNCOMMENT THE FOLLOWING LINE WHEN VELOCITY BLOBS ARE CORRECT IN ISIS
//ephemRates.append(ephemRate << vel[0] * 1000 << vel[1] * 1000 << vel[2] * 1000);
et += dtEphem;
}
//TO DO: DELETE THE FOLLOWING LINES WHEN VELOCITY BLOBS ARE CORRECT IN ISIS
// Compute the spacecraft velocity at each ephemeris point
// (We must do this when blobs are not attached because the Spice Class
// stores in memory the same data that would be in a blob...even when reading NAIF kernels)
double deltaTime = 2.0 * dtEphem;
numEphem = numEphem - 2; // set numEphem back to the number we need output
for (int i = 0; i < numEphem; i++) {
double vec[3] = {0.0, 0.0, 0.0};
vec[0] = (ephemPts[i+2][0] - ephemPts[i][0]) / deltaTime;
vec[1] = (ephemPts[i+2][1] - ephemPts[i][1]) / deltaTime;
vec[2] = (ephemPts[i+2][2] - ephemPts[i][2]) / deltaTime;
QList<double> ephemRate;
ephemRates.append(ephemRate << vec[0] << vec[1] << vec[2]);
}
}
//update ephem stats
double etFirstEphem = etCenter - (((numEphem - 1) / 2) * dtEphem);
double t0Ephem = etFirstEphem - etCenter;
// Using the intrumentPointing table as a guide build the quarternions
// for simplicity sake we'll leave the mountingAngles as identity
// and store the complete rotation from body fixed to camera in the
// quarternions
//set up quaternions number and spacing
Table tablePointing("InstrumentPointing", cubeHeader->fileName());
//number of quaternions
int numQuaternions = tablePointing.Records();
// increase the number of quaternions nodes by 20%. This is somewhat random but
// generally intended to compensate for having equally time spaced nodes
// instead of of the potentially more efficient placement used by spiceinit
numQuaternions = (int)(numQuaternions * 1.2);
// if numQuaternions calcutated from SPICE blobs is too sparse for SOCET Set,
// mulitiply it by a factor of 30
// (30X was settled upon emperically. In the future, make this an input parameter)
if (numQuaternions <= 10) numQuaternions = tablePointing.Records() * 30;
//make the number of nodes odd
numQuaternions = (numQuaternions % 2) == 1 ? numQuaternions : numQuaternions + 1;
// SOCET has a max number of quaternions of 20000, and we're going to add twenty...
if (numQuaternions > 20000 - 20) numQuaternions = 19179;
double dtQuat = scanDuration / double(numQuaternions);
// build the tables of values
QList< QList<double> > quaternions;
double et = etCenter - (((numQuaternions - 1) / 2) * dtQuat);
for (int i = 0; i < numQuaternions; i++) {
cam->setTime(iTime(et));
vector<double> j2000ToBodyFixedMatrixVector = cam->bodyRotation()->Matrix();
vector<double> j2000ToCameraMatrixVector = cam->instrumentRotation()->Matrix();
double quaternion[4] = {0.0, 0.0, 0.0, 0.0};
double j2000ToBodyFixedRotationMatrix[3][3], //rotation from J2000 to target (aka body, planet)
j2000ToCameraRotationMatrix[3][3], //rotation from J2000 to spacecraft
cameraToBodyFixedRotationMatrix[3][3]; //rotation from camera to target
// reformat vectors to 3x3 rotation matricies
for (int j = 0; j < 3; j++) {
for (int k = 0; k < 3; k++) {
j2000ToBodyFixedRotationMatrix[j][k] = j2000ToBodyFixedMatrixVector[3 * j + k];
j2000ToCameraRotationMatrix[j][k] = j2000ToCameraMatrixVector[3 * j + k];
}
}
// get the quaternion
mxmt_c(j2000ToBodyFixedRotationMatrix, j2000ToCameraRotationMatrix,
cameraToBodyFixedRotationMatrix);
m2q_c(cameraToBodyFixedRotationMatrix, quaternion);
// add the quaternion to the list of quaternions
QList<double> quat;
quaternions.append(quat << quaternion[1] << quaternion[2] << quaternion[3] <<
quaternion[0]);
//note also that the order is changed to match socet
et += dtQuat;
}
// linearlly interpolate 10 additional nodes before the first quaternion (SOCET requires this)
for (int i = 0; i < 10; i++) {
double vec[4] = {0.0, 0.0, 0.0, 0.0};
vec[0] = quaternions[0][0] + (quaternions[0][0] - quaternions[1][0]);
vec[1] = quaternions[0][1] + (quaternions[0][1] - quaternions[1][1]);
vec[2] = quaternions[0][2] + (quaternions[0][2] - quaternions[1][2]);
vec[3] = quaternions[0][3] + (quaternions[0][3] - quaternions[1][3]);
QList<double> quat;
quaternions.prepend (quat << vec[0] << vec[1] << vec[2] << vec[3]);
}
// linearlly interpolate 10 additional nodes after the last quaternion (SOCET requires this)
for (int i = 0; i < 10; i++) {
double vec[4] = {0.0, 0.0, 0.0, 0.0};
int index = quaternions.size() - 1;
vec[0] = quaternions[index][0] + (quaternions[index][0] - quaternions[index - 1][0]);
vec[1] = quaternions[index][1] + (quaternions[index][1] - quaternions[index - 1][1]);
vec[2] = quaternions[index][2] + (quaternions[index][2] - quaternions[index - 1][2]);
vec[3] = quaternions[index][3] + (quaternions[index][3] - quaternions[index - 1][3]);
QList<double> quat;
quaternions.append(quat << vec[0] << vec[1] << vec[2] << vec[3]);
}
//update quaternions stats
numQuaternions += 20;
//ephemeris time of the first quarternion
double et0Quat = etCenter - (((numQuaternions - 1) / 2) * dtQuat);
//quadrtic time of the first quarternion
double qt0Quat = et0Quat - etCenter;
//query remaing transformation parameters from Camera Classes
//transformation to distortionless focal plane
double zDirection = distortionMap->ZDirection();
//transformation from DistortionlessFocalPlane to FocalPlane
vector<double> opticalDistCoefs = distortionMap->OpticalDistortionCoefficients();
// For instruments with less than 3 distortion coefficients, set the
// unused ones to 0.0
opticalDistCoefs.resize(3, 0);
//transformation from focal plane to detector
const double *iTransS = focalMap->TransS();
const double *iTransL = focalMap->TransL();
double detectorSampleOrigin = focalMap->DetectorSampleOrigin();
double detectorLineOrigin = focalMap->DetectorLineOrigin();
//transformation from dectector to cube
double startingSample = detectorMap->AdjustedStartingSample();
double startingLine = detectorMap->AdjustedStartingLine();
double sampleSumming = detectorMap->SampleScaleFactor();
double etStart = ((LineScanCameraDetectorMap *)detectorMap)->StartTime();
double lineOffset = focalMap->DetectorLineOffset();
// We are done with computing keyword values, so output the Line Scanner
// Keyword file.
// This is the SOCET SET base sensor class keywords portion of support file:
toStrm.setf(ios::scientific);
toStrm << "RECTIFICATION_TERMS" << endl;
toStrm << " " << setprecision(14) << rectificationTerms[0] << " " <<
rectificationTerms[1] << " " << rectificationTerms[2] << endl;
toStrm << " " << rectificationTerms[3] << " " << rectificationTerms[4] <<
" " << rectificationTerms[5] << endl;
toStrm << "GROUND_ZERO ";
toStrm << centerGp[0] << " " << centerGp[1] << " " << centerGp[2] << endl;
toStrm << "LOAD_PT ";
toStrm << centerGp[0] << " " << centerGp[1] << " " << centerGp[2] << endl;
toStrm << "COORD_SYSTEM 1" << endl;
toStrm << "IMAGE_MOTION 0" << endl;
// This is the line scanner sensor model portion of support file:
toStrm << "SENSOR_TYPE USGSAstroLineScanner" << endl;
toStrm << "SENSOR_MODE UNKNOWN" << endl;
toStrm << "FOCAL " << focal << endl;
toStrm << "ATMCO";
for (int i = 0; i < 4; i++) toStrm << " " << atmco[i];
toStrm << endl;
toStrm << "IOCOEF_LINE";
for (int i = 0; i < 10; i++) toStrm << " " << ioCoefLine[i];
toStrm << endl;
toStrm << "IOCOEF_SAMPLE";
for (int i = 0; i < 10; i++) toStrm << " " << ioCoefSample[i];
toStrm << endl;
toStrm << "ABERR 0" << endl;
toStrm << "ATMREF 0" << endl;
toStrm << "PLATFORM 1" << endl;
toStrm << "SOURCE_FLAG 1" << endl;
toStrm << "SINGLE_EPHEMERIDE 0" << endl;
//Note, for TRI_PARAMETERS, we print the first element separate from the rest so that the array
//starts in the first column. Otherwise, SOCET Set will treat the array as a comment
toStrm << "TRI_PARAMETERS" << endl;
toStrm << triParams[0];
for (int i = 1; i < 18; i++) toStrm << " " << triParams[i];
toStrm << endl;
toStrm << setprecision(25) << "T_CENTER ";
double tCenter = 0.0;
//TO DO: UNCOMMENT THESE LINES ONCE HRSC IS WORKING IN SS
// if (isHRSC) {
// tCenter = etCenter - HRSCNadirCenterTime;
// toStrm << tCenter << endl;
// }
// else
toStrm << tCenter << endl;
toStrm << "DT_EPHEM " << dtEphem << endl;
toStrm << "T0_EPHEM ";
//TO DO: UNCOMMENT THESE LINES ONCE HRSC IS WORKING IN SS
// if (isHRSC) {
// double t = tCenter + t0Ephem;
// toStrm << t << endl;
// }
// else
toStrm << t0Ephem << endl;
toStrm << "NUMBER_OF_EPHEM " << numEphem << endl;
toStrm << "EPHEM_PTS" << endl;
//TO DO: DELETE THE FOLLOWING LINE WHEN VELOCITY BLOBS ARE CORRECT IN ISIS
for (int i = 1; i <= numEphem; i++) {
//TO DO: UNCOMMENT THE FOLLOWING LINE WHEN VELOCITY BLOBS ARE CORRECT IN ISIS
//for (int i = 0; i < numEphem; i++) {
toStrm << " " << ephemPts[i][0];
toStrm << " " << ephemPts[i][1];
toStrm << " " << ephemPts[i][2] << endl;
}
toStrm << "\n\nEPHEM_RATES" << endl;
for (int i = 0; i < numEphem; i++) {
toStrm << " " << ephemRates[i][0];
toStrm << " " << ephemRates[i][1];
toStrm << " " << ephemRates[i][2] << endl;
}
toStrm << "\n\nDT_QUAT " << dtQuat << endl;
toStrm << "T0_QUAT " << qt0Quat << endl;
toStrm << "NUMBER_OF_QUATERNIONS " << numQuaternions << endl;
toStrm << "QUATERNIONS" << endl;
for (int i = 0; i < numQuaternions; i++) {
toStrm << " " << quaternions[i][0];
toStrm << " " << quaternions[i][1];
toStrm << " " << quaternions[i][2];
toStrm << " " << quaternions[i][3] << endl;
}
toStrm << "\n\nSCAN_DURATION " << scanDuration << endl;
// UNCOMMENT toStrm << "\nNUMBER_OF_INT_TIMES " << numIntTimes << endl;
//
// if (isHRSC) {
// toStrm << "INT_TIMES" << endl;
// for (int i = 0; i < numIntTimes; i++) {
// LineRateChange lr = lineRates.at(i);
// toStrm << " " << lr.GetStartEt();
// toStrm << " " << lr.GetLineScanRate();
// toStrm << " " << lr.GetStartLine() << endl;
// }
// }
// else
toStrm << "INT_TIME " << intTime << endl;
toStrm << "\nALONG_SCAN_PIXEL_SIZE " << alongScanPxSize << endl;
toStrm << "CROSS_SCAN_PIXEL_SIZE " << crossScanPxSize << endl;
toStrm << "\nCENTER_GP";
for (int i = 0; i < 3; i++) toStrm << " " << centerGp[i];
toStrm << endl;
toStrm << "SENSOR_POSITION";
for (int i = 0; i < 3; i++) toStrm << " " << sensorPosition[i];
toStrm << endl;
toStrm << "MOUNTING_ANGLES";
double mountingAngles[3] = {0.0, 0.0, 0.0};
for (int i = 0; i < 3; i++) toStrm << " " << mountingAngles[i];
toStrm << endl;
toStrm << "\nTOTAL_LINES " << totalLines << endl;
toStrm << "TOTAL_SAMPLES " << totalSamples << endl;
toStrm << "\n\n\n" << endl;
toStrm << "IKCODE " << ikCode << endl;
toStrm << "ISIS_Z_DIRECTION " << zDirection << endl;
toStrm << "OPTICAL_DIST_COEF";
for (int i = 0; i < 3; i++) toStrm << " " << opticalDistCoefs[i];
toStrm << endl;
toStrm << "ITRANSS";
for (int i = 0; i < 3; i++) toStrm << " " << iTransS[i];
toStrm << endl;
toStrm << "ITRANSL";
for (int i = 0; i < 3; i++) toStrm << " " << iTransL[i];
toStrm << endl;
toStrm << "DETECTOR_SAMPLE_ORIGIN " << detectorSampleOrigin << endl;
toStrm << "DETECTOR_LINE_ORIGIN " << detectorLineOrigin << endl;
toStrm << "DETECTOR_LINE_OFFSET " << lineOffset << endl;
toStrm << "DETECTOR_SAMPLE_SUMMING " << sampleSumming << endl;
toStrm << "STARTING_SAMPLE " << startingSample << endl;
toStrm << "STARTING_LINE " << startingLine << endl;
toStrm << "STARTING_EPHEMERIS_TIME " << setprecision(25) << etStart << endl;
toStrm << "CENTER_EPHEMERIS_TIME " << etCenter << endl;
} // end main
