RANGECMP4

Highly compressed version of the RANGE log

Platform:

OEM719, OEM729, OEM7500, OEM7600, OEM7700, OEM7720, PwrPak7, CPT7, CPT7700, SMART7, SMART2

This log contains the RANGE data in a more heavily compressed format compared to the RANGECMP2 log.

For dual antenna receivers, a RANGECMP4_1 log can be requested to get RANGECMP4 data from the second antenna. As described in Table: Binary Message Header Structure, the message type indicates the log is from the second antenna. To request an ASCII log enter RANGECMP4A_1, and for a binary log enter RANGECMP4B_1.

Channels that have been manually assigned to a PRN with ASSIGN or ASSIGNALL are not reported in the RANGECMP4 log.
L-Band channels are not reported in the RANGECMP4 log.
RANGECMP4 is a complex log. For more information about decoding the RANGECMP4 log, refer to Example of Bit Parsing a RANGECMP4 Log.

Message ID: 2050

Log Type: Synch

Recommended Input:

log rangecmp4a ontime 10

Example:

#RANGECMP4A,COM1,0,81.5,FINESTEERING,1921,228459.000,00000020,fb0e,32768;627,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*6de99eb7

Field	Field Type	Description	Format	Binary Bytes	Binary Offset
1	RANGECMP4 header	Log header. For information about the log headers, see ASCII, Abbreviated ASCII or Binary.	-	H	0
2	# bytes	Number of bytes in the compressed binary Range Data.	Uchar	4	H
3	Range Data	The compressed binary range data is organized into satellite system blocks which break down into measurement blocks for each active signal within each system. Refer to the following tables for more details about this format: Table: Header (sent once) Table: Satellite and Signal Block (sent once per satellite system bit set to 1 in the GNSS Field found in Table: Header) Table: Measurement Block Header (sent once for each bit set to 1 in the Satellites Field found in Table: Satellite and Signal Block) Table: Primary Reference Signal Measurement Block and Table: Secondary Reference Signals Measurement Block, or Table: Primary Differential Signal Measurement Block and Table: Secondary Differential Signals Measurement Block, Measurement Block (sent for each bit set to 1 in the Included Signals Field for a given satellite found in Table: Satellite and Signal Block) The byte data is received MSB first so each group of bytes (as defined by the number of needed bits) must be swapped prior to processing.	Uchar	# bytes	H+4
4	xxxx	32-bit CRC (ASCII only)	Hex	4	H+4+(# bytes)
5	[CR][LF]	Sentence terminator (ASCII only)	-	-	-

Header
Data Name	Description	Bits	Scale Factor
GNSS	Indicates which satellite system data is encoded and in what order. When the bit is set the satellite data is included. Data for each system is encoded sequentially: Bit 0 = GPS Bit 1 = GLONASS Bit 2 = SBAS Bit 5 = Galileo Bit 6 = BeiDou Bit 7 = QZSS Bit 9 = NavIC	16	1
Bit Sum:		16
This block is sent once per message

Satellite and Signal Block
Data Name	Range	Description	Bits	Scale Factor
Satellites	0… 1.84467E+19	Indicates which satellites are present for this system and their order in the message. Each PRN is represented by a bit. (Bit 0 = PRN 1, Bit 1 = PRN 2, …) Notes: GLONASS Satellite: This value represents the Slot ID of the satellite (range of 1 to 24 where Bit 0 = Slot ID 1). In the event the Slot ID is between 43 and 63, the actual GLONASS Slot ID has not yet been determined and has been replaced with a temporary Slot ID calculated using the GLONASS Frequency Number. See the GLONASS Frequency Number field in Table: Measurement Block Header for more details. SBAS Satellite PRNs 120 to 158 are offset by 120. (Bit 0 = PRN 120, Bit 1 = 121, …) SBAS Satellite PRNs 183 to 191 are offset by 130 QZSS Satellite PRNs are offset by 193	64	1
Signals	0… 65535	Indicates which signals are present for this system and their order in the message. Each signal is represented by a bit as defined in Table: Signal Bit Mask.	16	1
Included Signals	0… mxn	A two dimensional field to tell the decoder which signals are present for each of the satellites. m = The number of rows equals the number of bits set to 1 found in the Satellites field. (Maximum number of PRNs in the satellite system) n = The number of columns equals the number of bits set to 1 found in the Signals field. (Maximum number of Signals in the satellite system)	mxn
Bit Sum:			80 + mxn
This block is sent once for each bit set to 1 in the GNSS field found in Table: Header.

Measurement Block Header
Data Name	Range	Description	Bits	Scale Factor
Data Format Flag	0… 1	Identifies what type of Measurement Block will be used: 0 = Reference (Table: Primary Reference Signal Measurement Block and Table: Secondary Reference Signals Measurement Block) 1 = Differential (Table: Primary Differential Signal Measurement Block and Table: Secondary Differential Signals Measurement Block)	1	1
Ref Data Block ID	0… 7	This ID identifies to which reference data the Differential Data is linked. This value is incremented by 1 each time a new Reference Measurement Block is used.	3	1
GLONASS Frequency Number	0… 20 (-7 to +13)	These bits are only present for GLONASS satellites in the Reference Data. This represents the GLONASS Frequency Number which identifies the frequency offset of the carrier frequency. The value will appear as a number between 0 and 20 which directly translates into a frequency offset number between -7 to +13. If the GLONASS Slot ID is unknown, a temporary Slot ID for this satellite will be set between 43 and 63 based on the GLONASS Frequency Number: PRN = 63 – GLONASS Frequency Number The GLONASS Frequency Number used in this calculation is the 0 to 20 value, not the adjusted -7 to +13 value.	5	1
Bit Sum:			4 (Non-GLONASS) 9 (GLONASS)
This block is sent once for each bit set to 1 in the Satellites field found in Table: Satellite and Signal Block.

Primary Reference Signal Measurement Block
Data Name	Range	Description	Bits	Scale Factor
Parity Flag	0… 1	0 = Parity Unknown 1 = Parity Known	1	1
½ Cycle Flag	0… 1	0 = Half Cycle Not Added 1 = Half Cycle Added	1	1
C/No	0… 63.95	C/No	11	0.05 dBHz
Lock Time	0… 15	The Lock Time – See Table: Lock Time	4	1
Pseudorange Std Dev	0… 15	The Pseudorange Standard Deviation (m) – See Table: Pseudorange Std Dev	4
ADR Std Dev	0… 15	The ADR Standard Deviation (cycles) – See Table: ADR Std Dev	4
Primary Pseudorange	0… 68719476.74	The Pseudo Range of the 1st signal (Signals field in Table: Satellite and Signal Block). If this value equals (2³⁷-1) = 137438953471, it represents a signal that is not locked.	37	0.0005 m
PhaseRange – Primary Pseudorange	±419.4303	(2’s Complement) If this value equals –(2²³-1) = -4194304, it represents the signal is not locked.	23	0.0001 m
Primary Doppler	±3355.4431	(2’s Complement) If this value equals –(2²⁶-1) = -33554432, it represents an invalid Doppler.	26	0.0001 m/s
Bit Sum:			111
This block is sent once for the first bit set to 1 in the Included Signals field found in Table: Satellite and Signal Block. For any bits set to 1 after the first bit set to 1, refer to Table: Secondary Reference Signals Measurement Block. This table is for Reference blocks only, as indicated by the Data Format Flag (see Table: Measurement Block Header).

Secondary Reference Signals Measurement Block
Data Name	Range	Description	Bits	Scale Factor
Parity Flag	0… 1	0 = Parity Unknown 1 = Parity Known	1	1
½ Cycle Flag	0… 1	0 = Half Cycle Not Added 1 = Half Cycle Added	1	1
C/No Indicator	0… 63.95	C/No	11	0.05 dBHz
Lock Time	0… 15	The Lock Time – See Table: Lock Time	4	1
Pseudorange Std Dev	0… 15	The Pseudorange Standard Deviation (m) – See Table: Pseudorange Std Dev	4
ADR Std Dev	0… 15	The ADR Standard Deviation (cycles) – See Table: ADR Std Dev	4
Pseudorange – Primary Signal Pseudorange	±262.1435	(2’s Complement) If this value equals –(2²⁰-1) = -524288, it indicates the signal is not locked.	20	0.0005 m
Phaserange – Pseudorange	±419.4303	(2’s Complement) If this value equals –(2²³-1) = -4194304, it indicates the signal is not locked.	23	0.0001 m
Doppler – Primary Doppler	±0.8191	(2’s Complement) If this value equals –(2¹⁴-1) = -8192, it indicates an invalid Doppler.	14	0.0001 m/s
Bit Sum:			82
This block is sent once for each bit set to 1 after the first bit set to 1 in the Included Signals field found in Table: Satellite and Signal Block. This table is for Reference blocks only, as indicated by the Data Format Flag (see Table: Measurement Block Header).

Primary Differential Signal Measurement Block
Data Name	Range	Description	Bits	Scale Factor
Parity Flag	0… 1	0 = Parity Unknown 1 = Parity Known	1	1
½ Cycle Flag	0… 1	0 = Half Cycle Not Added 1 = Half Cycle Added	1	1
C/No	0… 63.95	C/No	11	0.05 dBHz
Lock Time	0… 15	The Lock Time – See Table: Lock Time	4	1
Pseudorange Std Dev	0… 15	The Pseudorange Standard Deviation (m) – See Table: Pseudorange Std Dev	4
ADR Std Dev	0… 15	The ADR Standard Deviation (cycles) – See Table: ADR Std Dev	4
Pseudorange – Predicted Pseudorange	±131.0715	(2’s Complement) If this value equals –(2¹⁹-1) = -262144, it indicates a signal that is not locked. The Predicted Pseudorange = reference pseudorange plus (the reference doppler x time difference between the reference log and the differential log). The Reference log and Differential logs used must contain matching Ref Data Block ID references (Table: Measurement Block Header).	19	0.0005 m
Phaserange – Predicted Phaserange	±3.2767	(2’s Complement) If this value equals –(2¹⁶-1) = -32768, it indicates the signal is not locked. The Predicted Phaserange = reference phaserange plus (the reference doppler x time difference between the reference log and the differential log). The Reference log and Differential logs used must contain matching Ref Data Block ID references (Table: Measurement Block Header).	16	0.0001 m
Doppler – Reference Doppler	±13.1071	(2’s Complement) If this value equals –(2¹⁸-1) = -131072, it indicates an invalid Doppler. The Reference Doppler is the Doppler for that PRN and for that signal from the Reference log. The Reference log and Differential logs used must contain matching Ref Data Block ID references (Table: Measurement Block Header).	18	0.0001 m/s
Bit Sum:			78
This block is sent once for each bit set to 1 after the first bit set to 1 in the Included Signals field found in Table: Satellite and Signal Block. For any bits set to 1 after the first bit set to 1, refer to Table: Secondary Differential Signals Measurement Block. This table is for Differential blocks only, as indicated by the Data Format Flag (see Table: Measurement Block Header).

Secondary Differential Signals Measurement Block
Data Name	Range	Description	Bits	Scale Factor
Parity Flag	0… 1	0 = Parity Unknown 1 = Parity Known	1	1
½ Cycle Flag	0… 1	0 = Half Cycle Not Added 1 = Half Cycle Added	1	1
C/No	0… 63.95	C/No	11	0.05 dBHz
Lock Time	0… 15	The Lock Time – See Table: Lock Time	4	1
Pseudorange Std Dev	0… 15	The Pseudorange Standard Deviation (m) – See Table: Pseudorange Std Dev	4	1
ADR Std Dev	0… 15	The ADR Std Dev (cycles)– See Table: ADR Std Dev	4	1
Pseudorange – Predicted Pseudorange	±131.0715	(2’s Complement) If this value equals –(2¹⁹-1) = -262144, it indicates the signal is not locked. The Predicted Pseudorange = reference pseudorange plus (the reference doppler x time difference between the reference log and the differential log). The Reference log and Differential logs used must contain matching Ref Data Block ID references (Table: Measurement Block Header).	19	0.0005 m
Phaserange – Predicted Phaserange	±3.2767	(2’s Complement) If this value equals –(2¹⁶-1) = -32768, it indicates the signal is not locked. The Predicted Phaserange = reference phaserange plus (the reference doppler x time difference between the reference log and the differential log). The Reference log and Differential logs used must contain matching Ref Data Block ID references (Table: Measurement Block Header).	16	0.0001 m
Doppler – Reference Doppler	±13.1071	(2’s Complement) If this value equals –(2¹⁴-1) = -8192, it indicates an invalid Doppler. The Reference Doppler is the Doppler for that PRN and for that signal from the Reference log. The Reference log and Differential logs used must contain matching Ref Data Block ID references (Table: Measurement Block Header).	14	0.0001 m/s
Bit Sum:			74
This block is sent once for each bit set to 1 after the first bit set to 1 in the Included Signals field found in Table: Satellite and Signal Block. This table is for Differential blocks only, as indicated by the Data Format Flag (see Table: Measurement Block Header).

Signal Bit Mask
	GPS	GLONASS	SBAS	Galileo	BeiDou	QZSS	NavIC
Bit 1	L1CA	L1CA	L1CA	E1	B1I	L1CA	L5SPS
Bit 2			L5I	E5A	B1GEO
Bit 3		L2CA		E5B	B2I	L2C
Bit 4	L2Y	L2P		ALTBOC	B2GEO	L5Q
Bit 5	L2C			E6C	B3I
Bit 6	L2P	L3			B3GEO
Bit 7	L5Q				B1CP
Bit 8						L1C
Bit 9					B2AP
Bit 10
Bit 11					B2bI	L6P
Bit 12				E6B
Bit 13
Bit 14
Bit 15	L1C

Lock Time
Indicator (i)	Minimum Lock Time (ms)	Range of Indicated Lock Times (t represents the Lock Time) (ms)
0	0	0 ≤ t < 16
1	16	16 ≤ t < 32
2	32	32 ≤ t < 64
3	64	64 ≤ t < 128
4	128	128 ≤ t < 256
5	256	256 ≤ t < 512
6	512	512 ≤ t < 1024
7	1024	1024 ≤ t < 2048
8	2048	2048 ≤ t < 4096
9	4096	4096 ≤ t < 8192
10	8192	8192 ≤ t < 16384
11	16384	16384 ≤ t < 32768
12	32768	32768 ≤ t < 65536
13	65536	65536 ≤ t < 131072
14	131072	131072 ≤ t < 262144
15	262144	262144 ≤ t

ADR Std Dev
ADR Std Dev (cycles)
0	≤ 0.0039
1	≤ 0.0052
2	≤ 0.0070
3	≤ 0.0093
4	≤ 0.0124
5	≤ 0.0165
6	≤ 0.0221
7	≤ 0.0295
8	≤ 0.0393
9	≤ 0.0525
10	≤ 0.0701
11	≤ 0.0935
12	≤ 0.1248
13	≤ 0.1666
14	≤ 0.2223
15	> 0.2223

Pseudorange Std Dev
Pseudorange Std Dev (m)
0	≤ 0.020
1	≤ 0.030
2	≤ 0.045
3	≤ 0.066
4	≤ 0.099
5	≤ 0.148
6	≤ 0.220
7	≤ 0.329
8	≤ 0.491
9	≤ 0.732
10	≤ 1.092
11	≤ 1.629
12	≤ 2.430
13	≤ 3.625
14	≤ 5.409
15	> 5.409