76 lines
2.3 KiB
Python
76 lines
2.3 KiB
Python
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import re
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import datetime
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from isceobj.Orbit.Orbit import Orbit,StateVector
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class PDS(object):
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def __init__(self,file=None):
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self.filename = file
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self.firstEpoch = 0
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self.lastEpoch = 0
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self.orbit = Orbit()
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self.orbit.configure()
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self.orbit.setOrbitSource('PDS')
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def getOrbit(self):
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return self.orbit
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def parse(self):
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fp = open(self.filename,'r')
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for line in fp.readlines():
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if (line[0].isdigit()):
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self.__parseStateVectorLine(line)
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else:
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self.__parseRecordLine(line)
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fp.close()
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def __parseRecordLine(self,line):
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line = line.strip()
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if (line.startswith('START_TIME')):
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values = line.split('=')
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values[1] = values[1].strip('"')
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dateTime = values[1].split()
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self.firstEpoch = self.__parseDateTimeString(dateTime[0],dateTime[1])
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elif (line.startswith('STOP_TIME')):
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values = line.split('=')
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values[1] = values[1].strip('"')
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dateTime = values[1].split()
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self.lastEpoch = self.__parseDateTimeString(dateTime[0],dateTime[1])
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elif (line.startswith('LEAP_UTC')):
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pass
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elif (line.startswith('LEAP_SIGN')):
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pass
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elif (line.startswith('RECORD_SIZE')):
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pass
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elif (line.startswith('NUM_REC')):
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pass
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def __parseStateVectorLine(self,line):
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date = line[0:11]
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time = line[12:27]
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x = float(line[44:56])
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y = float(line[57:69])
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z = float(line[70:82])
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vx = float(line[83:95])
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vy = float(line[96:108])
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vz = float(line[109:121])
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dt = self.__parseDateTimeString(date,time)
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sv = StateVector()
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sv.configure()
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sv.setTime(dt)
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sv.setPosition([x,y,z])
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sv.setVelocity([vx,vy,vz])
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self.orbit.addStateVector(sv)
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def __parseDateTimeString(self,date,time):
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"""
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Fix idiosyncrasies in the date and time strings
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"""
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time = time.replace('-','0') # For some reason, there are occasionally - signs where there should be zeros
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dt = datetime.datetime.strptime(date + ' ' + time,'%d-%b-%Y %H:%M:%S.%f')
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return dt
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