def footprintFromPickle():
insar = pickle.load(open('PICKLE/preprocess', 'rb'))
planet = insar.masterFrame.getInstrument().getPlatform().getPlanet()
earlySquint = insar.masterFrame._squintAngle
orbit = insar.masterFrame.getOrbit()
lookSide = int(
insar.masterFrame.getInstrument().getPlatform().pointingDirection)
geolocate = Geolocate()
geolocate.wireInputPort(name='planet', object=planet)
nearRange = insar.masterFrame.getStartingRange()
farRange = insar.masterFrame.getFarRange()
earlyStateVector = orbit.interpolateOrbit(
insar.masterFrame.getSensingStart())
lateStateVector = orbit.interpolateOrbit(
insar.masterFrame.getSensingStop())
nearEarlyCorner, nearEarlyLookAngle, nearEarlyIncAngle = geolocate.geolocate(
earlyStateVector.getPosition(), earlyStateVector.getVelocity(),
nearRange, earlySquint, lookSide)
farEarlyCorner, farEarlyLookAngle, farEarlyIncAngle = geolocate.geolocate(
earlyStateVector.getPosition(), earlyStateVector.getVelocity(),
farRange, earlySquint, lookSide)
nearLateCorner, nearLateLookAngle, nearLateIncAngle = geolocate.geolocate(
lateStateVector.getPosition(), lateStateVector.getVelocity(),
nearRange, earlySquint, lookSide)
farLateCorner, farLateLookAngle, farLateIncAngle = geolocate.geolocate(
lateStateVector.getPosition(), lateStateVector.getVelocity(), farRange,
earlySquint, lookSide)
wkt = "POLYGON((%f %f, %f %f, %f %f, %f %f, %f %f))" % (
nearEarlyCorner.getLongitude(), nearEarlyCorner.getLatitude(),
farEarlyCorner.getLongitude(), farEarlyCorner.getLatitude(),
farLateCorner.getLongitude(), farLateCorner.getLatitude(),
nearLateCorner.getLongitude(), nearLateCorner.getLatitude(),
nearEarlyCorner.getLongitude(), nearEarlyCorner.getLatitude())
return wkt
class test_geolocate(unittest.TestCase):
def setUp(self):
# These are the state vectors for ERS-1 track 113 frame 2745 from 1993 01 09 near the scene start time
self.pos = [-2503782.263, -4652987.799, 4829281.081]
self.vel = [-4002.34200000018, -3450.91900000069, -5392.36600000039]
self.range = 831929.866545593
self.squint = 0.298143953340833
planet = Planet(pname='Earth')
self.geolocate = Geolocate()
self.geolocate.wireInputPort(name='planet', object=planet)
def tearDown(self):
pass
def testGeolocate(self):
ans = [42.457487, -121.276432]
loc, lla, lia = self.geolocate.geolocate(self.pos, self.vel,
self.range, self.squint)
lat = loc.getLatitude()
lon = loc.getLongitude()
self.assertAlmostEquals(lat, ans[0], 5)
self.assertAlmostEquals(lon, ans[1], 5)
def testLookAngle(self):
ans = 17.2150393
loc, lla, lia = self.geolocate.geolocate(self.pos, self.vel,
self.range, self.squint)
self.assertAlmostEquals(lla, ans, 5)
def calculateCorners(self):
"""
Calculate the approximate geographic coordinates of corners of the SAR image.
@return (\a tuple) a list with the corner coordinates and a list with the look angles to these coordinates
"""
# Extract the planet from the hh object
planet = self.hhObj.getFrame().getInstrument().getPlatform().getPlanet(
)
# Wire up the geolocation object
geolocate = Geolocate()
geolocate.wireInputPort(name='planet', object=planet)
# Get the ranges, squints and state vectors that defined the boundaries of the frame
orbit = self.hhObj.getFrame().getOrbit()
nearRange = self.hhObj.getFrame().getStartingRange()
farRange = self.hhObj.getFrame().getFarRange()
earlyStateVector = orbit.interpolateOrbit(
self.hhObj.getFrame().getSensingStart())
lateStateVector = orbit.interpolateOrbit(
self.hhObj.getFrame().getSensingStop())
earlySquint = 0.0 # assume a zero squint angle
nearEarlyCorner, nearEarlyLookAngle, nearEarlyIncAngle = geolocate.geolocate(
earlyStateVector.getPosition(), earlyStateVector.getVelocity(),
nearRange, earlySquint)
farEarlyCorner, farEarlyLookAngle, farEarlyIncAngle = geolocate.geolocate(
earlyStateVector.getPosition(), earlyStateVector.getVelocity(),
farRange, earlySquint)
nearLateCorner, nearLateLookAngle, nearLateIncAngle = geolocate.geolocate(
lateStateVector.getPosition(), lateStateVector.getVelocity(),
nearRange, earlySquint)
farLateCorner, farLateLookAngle, farLateIncAngle = geolocate.geolocate(
lateStateVector.getPosition(), lateStateVector.getVelocity(),
farRange, earlySquint)
self.logger.debug("Near Early Corner: %s" % nearEarlyCorner)
self.logger.debug("Near Early Look Angle: %s" % nearEarlyLookAngle)
self.logger.debug("Near Early Incidence Angle: %s " %
nearEarlyIncAngle)
self.logger.debug("Far Early Corner: %s" % farEarlyCorner)
self.logger.debug("Far Early Look Angle: %s" % farEarlyLookAngle)
self.logger.debug("Far Early Incidence Angle: %s" % farEarlyIncAngle)
self.logger.debug("Near Late Corner: %s" % nearLateCorner)
self.logger.debug("Near Late Look Angle: %s" % nearLateLookAngle)
self.logger.debug("Near Late Incidence Angle: %s" % nearLateIncAngle)
self.logger.debug("Far Late Corner: %s" % farLateCorner)
self.logger.debug("Far Late Look Angle: %s" % farLateLookAngle)
self.logger.debug("Far Late Incidence Angle: %s" % farLateIncAngle)
corners = [
nearEarlyCorner, farEarlyCorner, nearLateCorner, farLateCorner
]
lookAngles = [
nearEarlyLookAngle, farEarlyLookAngle, nearLateLookAngle,
farLateLookAngle
]
return corners, lookAngles
def footprintFromPickle():
insar = pickle.load(open('PICKLE/preprocess','rb'))
planet = insar.masterFrame.getInstrument().getPlatform().getPlanet()
earlySquint = insar.masterFrame._squintAngle
orbit = insar.masterFrame.getOrbit()
lookSide = int(insar.masterFrame.getInstrument().getPlatform().pointingDirection)
geolocate = Geolocate()
geolocate.wireInputPort(name='planet',object=planet)
nearRange = insar.masterFrame.getStartingRange()
farRange = insar.masterFrame.getFarRange()
earlyStateVector = orbit.interpolateOrbit(insar.masterFrame.getSensingStart())
lateStateVector = orbit.interpolateOrbit(insar.masterFrame.getSensingStop())
nearEarlyCorner,nearEarlyLookAngle,nearEarlyIncAngle =geolocate.geolocate(earlyStateVector.getPosition(),earlyStateVector.getVelocity(),nearRange,earlySquint,lookSide)
farEarlyCorner,farEarlyLookAngle,farEarlyIncAngle = geolocate.geolocate(earlyStateVector.getPosition(),earlyStateVector.getVelocity(),farRange,earlySquint,lookSide)
nearLateCorner,nearLateLookAngle,nearLateIncAngle = geolocate.geolocate(lateStateVector.getPosition(),lateStateVector.getVelocity(),nearRange,earlySquint,lookSide)
farLateCorner,farLateLookAngle,farLateIncAngle = geolocate.geolocate(lateStateVector.getPosition(),lateStateVector.getVelocity(),farRange,earlySquint,lookSide)
wkt = "POLYGON((%f %f, %f %f, %f %f, %f %f, %f %f))" % ( nearEarlyCorner.getLongitude(),nearEarlyCorner.getLatitude(),farEarlyCorner.getLongitude(),farEarlyCorner.getLatitude(),farLateCorner.getLongitude(),farLateCorner.getLatitude(), nearLateCorner.getLongitude(),nearLateCorner.getLatitude(),nearEarlyCorner.getLongitude(),nearEarlyCorner.getLatitude() )
return wkt
def makeLookIncidenceFiles(self):
"""
Make files containing the look and incidence angles to test the antenna pattern calibration
"""
import array
import datetime
# Extract the planet from the hh object
planet = self.hhObj.getFrame().getInstrument().getPlatform().getPlanet(
)
# Wire up the geolocation object
geolocate = Geolocate()
geolocate.wireInputPort(name='planet', object=planet)
# Get the ranges, squints and state vectors that defined the boundaries of the frame
orbit = self.hhObj.getFrame().getOrbit()
nearRange = self.hhObj.getFrame().getStartingRange()
deltaR = self.hhObj.getFrame().getInstrument().getRangePixelSize()
prf = self.hhObj.getFrame().getInstrument(
).getPulseRepetitionFrequency()
pri = 1.0 / prf
squint = 0.0 # assume a zero squint angle
lookFP = open('look.dat', 'wb')
incFP = open('inc.dat', 'wb')
# Calculate the variation in look angle and incidence angle for the first range line
time = self.hhObj.getFrame().getSensingStart(
) # + datetime.timedelta(microseconds=int(j*pri*1e6))
sv = orbit.interpolateOrbit(time=time)
look = array.array('f')
inc = array.array('f')
for i in range(self.width):
rangeDistance = nearRange + i * deltaR
coordinate, lookAngle, incidenceAngle = geolocate.geolocate(
sv.getPosition(), sv.getVelocity(), rangeDistance, squint)
look.append(lookAngle)
inc.append(incidenceAngle)
# Use the first range line as a proxy for the remaining lines
for j in range(self.length):
look.tofile(lookFP)
inc.tofile(incFP)
lookFP.close()
incFP.close()