RANGECMP2

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 compressed format. RANGECMP2 is more compressed than RANGECMP.

 

For dual antenna receivers, a RANGECMP2_1 log can be requested to get RANGECMP2 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 RANGECMP2A_1, and for a binary log enter RANGECMP2B_1.

The RANGECMP2 and RANGECMP2_1 logs use the same message ID.

 

  • The Phase locked flag and Code locked flag are reported in RANGECM2. Those two bits should be used to interpret the validity of ADR or PSR. The ADR is valid when Phase locked flag is set, and the PSR and Doppler are valid when Code locked flag is set. 

  • In firmware 7.10.xx, the ADR std field may not be big enough. 7.10.xx firmware will track more noisy signals, which means the ADR std may be larger than what the log field can accommodate.

  • In firmware 7.10.xx, the PSR std fields may not be big enough. When a channel is tracking in an FLL mode, the PSR std may be larger than what the log field can accommodate.

  • RANGECMP2 is not recommended for OEM 7.10.xx firmware release. Use the RANGECMP5 log instead.

Message ID: 1273

Log type: Synch

Recommended input:

log rangecmp2a ontime 10

Example:

#RANGECMP2A,USB1,0,55.0,FINESTEERING,2209,512524.000,02000020,1fe3,16809;2256,0

01a00a09fbc856c0540e1ffff6dd8c80c004201d1ffe4ffff4578e87c983d82d1ffe5ffff0dd8c8

75308082d1ffe7ffff0d5a667570f102faff01020010405f8592fb2fe1ffff2dbda41eb81980160

0e4ffff055ce61e0806001600021200542192852b0650e1ffff2dbc860f50e280ffffe4ffff0579

6655c83a820000e5ffff0dbc865f4800820000e7ffff0d3f62ad3033040900efffff097cc61e009

681fcff030c00ecf8b58551f83fe1ffff6dda06508021800d00e4ffff457948a400aa800c00e5ff

...

5cdfe3fe1ffff291f8417b01900d5ffe3ffff0d7f001b285f00d6ffedffff0d3e041ef86680deff

3c0c600078ef05cafa3fe1ffff29796829181500e5ffe3ffff4d9c6449685f80f5ffedffff0d79c

647307b80f6ff3e0e6018ff1306cc0630e1ffff2977e80f203a011100e3ffff4db80669d069830b

00edffff0d954856b8c88200003f176024e7f2057efb5fe1ffff293d0466980501dffff3ffff0db

be63bf81b02d6fff4ffff0d3f226fd0e380e2fff5ffff031ca45db89d80e9ffedffff0d784636b8

3900eaff*e438ba70

Field

Field type

Description

Format

Binary bytes

Binary offset

1

Log header

RANGECMP2 header

For information about log headers, see ASCII, Abbreviated ASCII or Binary.

 

H

0

2

# bytes

Number of bytes in the compressed binary range data.

The maximum is 2880 bytes for 120 channels or 5760 bytes for 240 channels.

Uchar

4

H

3

RangeData

Compressed binary range data in the format of Table: Satellite block of the range record format (RANGECMP2 only) and Table: Signal block of the range record format (RANGECMP2 only).

The compressed binary range data is organized into satellite blocks, one for each satellite. Each satellite block is followed by a variable number of signal blocks corresponding to the same satellite. For example, a Satellite Block for GPS PRN 17 may be followed by two Signal Blocks for the L1 C/A and L2C signals.

Uchar

#bytes

H+4

4

xxxx

32-bit CRC (ASCII and binary only)

Hex

4

H+4+
(# bytes)

5

[CR][LF]

Sentence terminator (ASCII only)

-

-

-
Satellite block of the range record format (RANGECMP2 only)

Data

Description

Bits first to last

Length (bits)

Scale factor

Units

SV Channel Number

Receiver SV channel number

0-7

8

-

-

Satellite Identifier

Satellite identifier specific to the satellite system

Refer to PRN numbers

8-15

8

-

-

GLONASS Frequency Identifier

GLONASS frequency channel offset by +7

16-19

4

(7+Ch#)

-

Satellite System Identifier

Defined in Table: Satellite system

20-24

5

-

Enum

Reserved

25

1

-

-

Pseudorange Base

Pseudorange base value to be combined with PSR Diff and Phaserange Diff in each following Signal Block

26-54

29

1

m

Doppler Base

Doppler base value to be combined with the Scaled Doppler Diff value in each following Signal Block

55-75

21

1

Hz

Number of Signal Blocks

The number of Signal Blocks to follow this Satellite Block. See Table: Signal block of the range record format (RANGECMP2 only) for Signal Block definition

76‑79

4

-

-
Signal block of the range record format (RANGECMP2 only)

Data

Description

Bits first to last

Length (bits)

Scale factor

Units

Signal Type

Defined in Table: Signal type (only in RANGECMP2)

0-4

5

-

Enum

Phase Lock

Phase Lock: 0 = Not locked, 1 = Locked

5

1

-

Bool

Parity Known

Parity Known: 0 = Not known, 1 = Known

6

1

-

Bool

Code Lock

Code Lock: 0 = Not locked, 1 = Locked

7

1

-

Bool

Locktime

Time of continuous tracking with no cycle slips. The locktime value saturates at a maximum of 131071 ms

8-24

17

1

ms

Correlator Type

Correlator type: (see Table: Correlator Type)

25-28

4

-

Enum

Primary Signal

Primary signal: 0 = Not primary,
1 = Primary

29

1

-

Bool

Carrier Phase Measurement

Carrier phase measurement:
0 = Half cycle not added, 1 = Half cycle added

30

1

-

Bool

Reserved

31

1

-

-

C/No

Carrier to Noise density ratio

32-36

5

(20 + n)

dB-Hz

StdDev PSR

Pseudorange Standard Deviation (defined Table: Std Dev PSR scaling)

37-40

4

Bit Field in Table: Std Dev PSR scaling

-

StdDev ADR

Carrier-Phase Standard Deviation (defined Table: Std Dev ADR scaling)

41-44

4

Bit Field in Table: Std Dev ADR scaling

-

PSR Diff

Pseudorange Diff to be combined with Pseudorange base i.e.,
PSR = PSRBase + PSRDiff/128

45-58

14

1/128

m (unsigned)

Phaserange Diff

Phaserange Diff to be combined with Pseudorange Base i.e.,
ADR = PSRBase + PhaserangeDiff/2048

59-78

20

1/2048

m (unsigned)

Scaled Doppler Diff1

Doppler Diff to be combined with Doppler Base. Note that all Doppler values are scaled to the L1/E1 equivalent value. (refer to Table: L1/E1/B1 scaling) i.e.,
Doppler = (DopplerBase + ScaledDopplerDiff/256)/L1ScaleFactor

Note: The Scaled Doppler Diff field is the only field in the RANGECMP2 log that should be parsed as Two's Complement. The most significant byte (MSB) determines whether the number will be positive (< 0x7) or negative (> 0x7). Two's complement should be applied prior to AND, right bit shift computations.

79‑95

17

1/256

Hz (signed)
Std Dev PSR scaling

PSR Std Dev bit field value

Represented 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
Std Dev ADR scaling

ADR Std Dev bit field value

Represented Std Dev (cycles)

0

0.00391

1

0.00521

2

0.00696

3

0.00929

4

0.01239

5

0.01654

6

0.02208

7

0.02947

8

0.03933

9

0.05249

10

0.07006

11

0.09350

12

0.12480

13

0.16656

14

0.22230

15

>0.22230
L1/E1/B1 scaling

Satellite system

Signal type

L1/E1/B1 scale factor

GPS

L1CA

1.0

L2Y

154/120

L2C

154/120

L5Q

154/115

GLONASS

L1CA

1.0

L2CA

9/7

L2P

9/7

SBAS

L1CA

1.0

L5I

154/115

Galileo

E1

1.0

E5A

154/115

E5B

154/118

AltBOC

154/116.5

E6C

154/125

E6B

154/125

QZSS

L1CA

1.0

L2C

154/120

L5Q

154/115

L6D (FW 7.10.xx)

154/125

L6P (FW 7.09.xx)

154/125

LBAND

LBAND

1.0

BDS

B1

1.0

B1C

1526/1540

B2

1526/1180

B2a

1526/1150

B2b

1526/1180

B3

1526/1240

NAVIC

L5SPS

1.0
Signal type (only in RANGECMP2)

Satellite system

Signal type

Value

GPS

L1CA

1

L2Y

4

L2CM

5

L5Q

7

L1C

15

GLONASS

L1CA

1

L2CA

3

L2P

4

L3Q

6

SBAS

L1CA

1

L5I

2

Galileo

E1C

1

E5AQ

2

E5BQ

3

AltBOCQ

4

E6C

5

E6B

12

QZSS

L1CA

1

L2CM

3

L5Q

4

L1C

8

L6D (FW 7.10.xx)

10

L6P (FW 7.09.xx)

11

LBAND

LBAND

1

BDS

B1D1I

1

B1D2I

2

B2D1I

3

B2D2I

4

B3D1I

13

B3D2I

16

B1CP

19

B2AP

20

B2B_I

21

NAVIC

L5SPS

1