/**
* reads an AOT Kx LUT (BBDR breadboard procedure GA_read_LUT_AOD)
*
* <p>A LUT value can be accessed with lut.getValue(new double[]{wvlValue, aotValue, hsfValue,
* aziValue, szaValue, vzaValue, parameterValue});
*
* @param sensor The sensor
* @return LookupTable
* @throws java.io.IOException when failing to real LUT data
*/
public static LookupTable getAotKxLookupTable(Sensor sensor) throws IOException {
ImageInputStream iis = Luts.getAotKxLutData(sensor.getInstrument());
try {
// read LUT dimensions and values
float[] vza = Luts.readDimension(iis);
int nVza = vza.length;
float[] sza = Luts.readDimension(iis);
int nSza = sza.length;
float[] azi = Luts.readDimension(iis);
int nAzi = azi.length;
float[] hsf = Luts.readDimension(iis);
int nHsf = hsf.length;
float[] aot = Luts.readDimension(iis);
int nAot = aot.length;
float[] kx = new float[] {1.0f, 2.0f};
int nKx = kx.length;
float[] wvl = sensor.getWavelength();
final int nWvl = wvl.length;
float[] lut = new float[nKx * nVza * nSza * nAzi * nHsf * nAot * nWvl];
iis.readFully(lut, 0, lut.length);
return new LookupTable(lut, wvl, aot, hsf, azi, sza, vza, kx);
} finally {
iis.close();
}
}
/**
* reads a NSky DW LUT (BBDR breadboard procedure GA_read_LUT_Nsky, first LUT) * This LUT is
* equivalent to the original IDL LUT. * A LUT value can be accessed with lut.getValue(new
* double[]{wvlValue, ozoValue, cwvValue, angValue, kxValue, kxcaseValue});
*
* @param sensor The sensor
* @return LookupTable
* @throws java.io.IOException when failing to real LUT data
*/
public static NskyLookupTable getNskyLookupTableDw(Sensor sensor) throws IOException {
ImageInputStream iis = Luts.getNskyDwLutData(sensor.getInstrument());
try {
// read LUT dimensions and values
float[] sza = Luts.readDimension(iis);
int nSza = sza.length;
float[] hsf = Luts.readDimension(iis);
int nHsf = hsf.length;
float[] aot = Luts.readDimension(iis);
int nAot = aot.length;
int nSpec = iis.readInt();
float[] spec = new float[nSpec];
for (int i = 0; i < spec.length; i++) {
spec[i] = (i + 1) * 1.0f;
}
double kppVol = iis.readDouble();
double kppGeo = iis.readDouble();
// todo: again, we have an array of length 2 as innermost part of the LUT,
// which has no meanigful name in breadboard --> clarify
float[] values = new float[] {1.0f, 2.0f};
int nValues = values.length;
float[] lut = new float[nValues * nSza * nHsf * nAot * nSpec];
iis.readFully(lut, 0, lut.length);
// store in original sequence (see breadboard: GA_read_LUT_Nsky)
NskyLookupTable nskyLut = new NskyLookupTable();
nskyLut.setLut(new LookupTable(lut, spec, aot, hsf, sza, values));
nskyLut.setKppGeo(kppGeo);
nskyLut.setKppVol(kppVol);
return nskyLut;
} finally {
iis.close();
}
}
/**
* reads an AOT LUT (BBDR breadboard procedure GA_read_LUT_AOD) * This LUT is equivalent to the
* original IDL LUT: for bd = 0, nm_bnd - 1 do $ for jj = 0, nm_aot - 1 do $ for ii = 0, nm_hsf -
* 1 do $ for k = 0, nm_azm - 1 do $ for j = 0, nm_asl - 1 do $ for i = 0, nm_avs - 1 do begin
* readu, 1, aux lut[*, i, j, nm_azm - k - 1, ii, jj, bd] = aux A LUT value can be accessed with
* lut.getValue(new double[]{wvlValue, aotValue, hsfValue, aziValue, szaValue, vzaValue,
* parameterValue});
*
* @param sensor The sensor
* @return LookupTable
* @throws java.io.IOException when failing to real LUT data
*/
public static AotLookupTable getAotLookupTable(Sensor sensor) throws IOException {
ImageInputStream iis = Luts.getAotLutData(sensor.getInstrument());
try {
// read LUT dimensions and values
float[] vza = Luts.readDimension(iis);
int nVza = vza.length;
float[] sza = Luts.readDimension(iis);
int nSza = sza.length;
float[] azi = Luts.readDimension(iis);
int nAzi = azi.length;
float[] hsf = Luts.readDimension(iis);
int nHsf = hsf.length;
// conversion from surf.pressure to elevation ASL
for (int i = 0; i < nHsf; i++) {
if (hsf[i] != -1) {
// 1.e-3 * (1.d - (xnodes[3, wh_nod] / 1013.25)^(1./5.25588)) / 2.25577e-5
final double a = hsf[i] / 1013.25;
final double b = 1. / 5.25588;
hsf[i] = (float) (0.001 * (1.0 - Math.pow(a, b)) / 2.25577E-5);
}
}
float[] aot = Luts.readDimension(iis);
int nAot = aot.length;
float[] parameters = new float[] {1.0f, 2.0f, 3.0f, 4.0f, 5.0f};
int nParameters = parameters.length;
float[] wvl = sensor.getWavelength();
final int nWvl = wvl.length;
float[] tgLut = new float[nParameters * nVza * nSza * nAzi * nHsf * nAot * nWvl];
for (int iWvl = 0; iWvl < nWvl; iWvl++) {
for (int iAot = 0; iAot < nAot; iAot++) {
for (int iHsf = 0; iHsf < nHsf; iHsf++) {
for (int iAzi = 0; iAzi < nAzi; iAzi++) {
for (int iSza = 0; iSza < nSza; iSza++) {
for (int iVza = 0; iVza < nVza; iVza++) {
for (int iParams = 0; iParams < nParameters; iParams++) {
int iAziTemp = nAzi - iAzi - 1;
int i =
iParams
+ nParameters
* (iVza
+ nVza
* (iSza
+ nSza
* (iAziTemp
+ nAzi
* (iHsf + nHsf * (iAot + nAot * iWvl)))));
tgLut[i] = iis.readFloat();
}
}
}
}
}
}
}
Luts.readDimension(iis, nWvl); // skip wavelengths
float[] solarIrradiances = Luts.readDimension(iis, nWvl);
// store in original sequence (see breadboard: loop over bd, jj, ii, k, j, i in
// GA_read_lut_AOD
AotLookupTable aotLut = new AotLookupTable();
aotLut.setLut(new LookupTable(tgLut, wvl, aot, hsf, azi, sza, vza, parameters));
aotLut.setWvl(wvl);
aotLut.setSolarIrradiance(solarIrradiances);
return aotLut;
} finally {
iis.close();
}
}