2010-10-24 07:51:09 +08:00
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#!/usr/bin/env python
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2010-10-19 00:59:08 +08:00
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#
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# Copyright 2010 Nick Foster
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#
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# This file is part of gr-air-modes
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#
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# gr-air-modes is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# any later version.
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#
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# gr-air-modes is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with gr-air-modes; see the file COPYING. If not, write to
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# the Free Software Foundation, Inc., 51 Franklin Street,
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# Boston, MA 02110-1301, USA.
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#
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2010-09-15 13:01:56 +08:00
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from modes_parse import *
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from cpr import *
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import sys
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my_location = [37.76225, -122.44254]
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shortdata = long(sys.argv[1], 16)
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longdata = long(sys.argv[2], 16)
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parity = long(sys.argv[3], 16)
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ecc = long(sys.argv[4], 16)
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2010-10-25 07:13:44 +08:00
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parser = modes_parse(my_location)
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[altitude, decoded_lat, decoded_lon, rnge, bearing] = parser.parseBDS06(shortdata, longdata, parity, ecc)
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2010-09-15 13:01:56 +08:00
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if decoded_lat is not None:
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print "Altitude: %i\nLatitude: %.6f\nLongitude: %.6f\nRange: %.2f\nBearing: %i\n" % (altitude, decoded_lat, decoded_lon, rnge, bearing,)
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print "Decomposing...\n"
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subtype = (longdata >> 51) & 0x1F;
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encoded_lon = longdata & 0x1FFFF
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encoded_lat = (longdata >> 17) & 0x1FFFF
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cpr_format = (longdata >> 34) & 1
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enc_alt = (longdata >> 36) & 0x0FFF
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print "Subtype: %i\nEncoded longitude: %x\nEncoded latitude: %x\nCPR format: %i\nEncoded altitude: %x\n" % (subtype, encoded_lon, encoded_lat, cpr_format, enc_alt,)
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#print "First argument is order %i, second %i" % ((evendata >> 34) & 1, (odddata >> 34) & 1,)
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#evenencpos = [(evendata >> 17) & 0x1FFFF, evendata & 0x1FFFF]
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#oddencpos = [(odddata >> 17) & 0x1FFFF, odddata & 0x1FFFF]
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#[declat, declon] = cpr_decode_global(evenencpos, oddencpos, newer)
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#print "Global latitude: %.6f\nGlobal longitude: %.6f" % (declat, declon,)
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