fastgps_config.txt

#
# Detailed configuration file for the fastgps software receiver
#
# Loads processing configuration details, including
#	Data input file
#	Sampling and Intermediate frequencies
#	Satellites to search for, by PRN number
#	Processing time, seconds
#	Output setings
#
# Formats
#
# Input Data File
#
# D filename
#
# Set Frequencies
#
# F a b
# a = sampling frequency, Hz
# b = IF centre, Hz
#
# Specify Satellite Search
#
# S a b ...
# a = either 99 -> perform cold search for all satellites,
#     or number of PRN's specified in subsequent list
# b = If a is not 99, the first PRN to search for
# c = If a is not 99, the second PRN to search for
# d ... etc
#
# Use Ephemeris File
#
# E a
# a = 1-> use existing fastgps_ephemeris_log.dat
#
# Processing Time
#
# T a
# a = processing time, seconds
#
# Tracking Loop Gains and Intervals (See Paul Groves book for details)
#
# G a b c d e f g h i 
# a = FLL switch time (ms), default 500
# b = PLL switch time (ms), default 1000
# c = PLL pullin time (ms), default 1500
# d = DLL gain1 Kc0 
# e = DLL gain2 Kc02 
# f = FLL gain1 Kca2_FLL1	// applied between a and b 
# g = FLL gain2 Kca2_FLL2   // applied upto a 
# h = PLL gain1 Kca2_PLL 
# i = DLL gain2 Kca3_PLL 
#
# Output Data Logging
#
# L a b c
# a = acquisition output flag, 0-> OFF, 1->NORMAL, 2-> NORMAL+DEBUG
# b = Tracking details output flag, 0-> OFF, 1->NORMAL (every 20ms), 2-> DEBUG (every 1ms)
# c = Navigation solution output flag, 0-> OFF, 1->NORMAL, 2-> NORMAL+DEBUG, 3->NORMAL+GOOGLE
#
# Aiding Information
#
# A a b c filename
# a = acquisition on-off flag, 0-> OFF, 1->ON
# b = GPS week of aiding file.
# c = GPS day of week of the aiding file.
# filename = filename (incl path) of the sp3 data file
#       notes: data being processing must be taken on same week and day as file if this is to work.
#              file must also be in 'old' sp3 _a_ format, use conversion utility included if needed.
#
# Extra Initialization
#
# I a b c d e f g h i j
# a = testflag (not used)
# b = Snapshot position flag (1=attempt snapshot position)
# c = Doppler position flag (1=attempt Doppler position)
# d = GPS week estimate for positioning attempts above (required for both)
# e = GPS seconds estimate for positioning attempts above (required for both)
# f = WGS84 X estimate for snapshot positioning attempt
# g = WGS84 Y estimate for snapshot positioning attempt
# h = WGS84 Z estimate for snapshot positioning attempt
# i = PVT interval in seconds
# j = testflag (not used)
#
# WAAS Differential Corrections, Ionosphere
#
# W filename
#
#########################################################
#
# only lines preceded by a 'hat' are processed
#
# STG 2008
#

# datafile location. Change to reflect your data file.
D data/May15_2008_Guildford_DataSet1.dat
D data/May16_2008_Stanford_DataSet2.dat
^D data/Sept23_2009_Savannah.dat

# Frequencies
^F 16.3676e6 4.1304e6	# SiGe, sampling frequency, IF

# Satellites
S 1 2       # prn2 only, Guild
S 99		# cold search
^S 100		# use last acq log file to acquire

# Ephemeris file
E 1        # use it

# Process Time
T 4.0		# seconds
^T 10.0		# seconds
T 15.0		# seconds
T 20.0		# seconds
T 35.0		# seconds

# Data Logging
^L 1 1 3 	# acq,track,nav(w google) on

# Tracking Loop Gains and Intervals
G 500 1000 1500 0.004 1.0 0.10 1.15 0.10 0.93 	# default values, 

# Aiding information
A 1 1479 4 data/igu14794_06.sp3   # Guildford
A 1 1479 4 data/igu14795_18.sp3   # Stanford
^A 1 1550 3 data/igu15503_12.sp3   # Savannah

# Initial Time and Position Estimate, testflag, snapshot pos flag, dopp pos flag
# then, gpsweek,gpssecs,wgs84 X,Y,Z, pvt interval (seconds), testflag
^I 0 0 0 0 0 0 0 0 0.2 0.005  # all fancy stuff OFF
I 0 1 0 1479 388470 4000550.0 -39057.0 4950837.0 0.2 0.005  # Guildford  DataSet1, Snap Shot Position only
I 0 1 1 1479 388470 0 0 0 0.2 0.005 # Guildford  DataSet1, Doppler Position to Snap Shot Positioning 
I 0 1 0 1479 490176 -2700159.20823 -4292735.90216 3855193.03352 0.2 0.005  # Stanford DataSet2, Snap Shot Position only
I 0 1 1 1479 490176 0 0 0 0.2 0.005  # Stanford DataSet2, Doppler Position to Snap Shot Positioning 
I 0 1 0 1550 320442 838146 -5343725 3368351 0.1 0.005  # Savannah, Doppler Position to Snap Shot Positioning 
I 0 1 1 1550 320442 0 0 0 0.2 0.005  # Savannah, Doppler Position to Snap Shot Positioning 

# WAAS Differential Corrections, Ionosphere
W data/demo_igp