RANGE

Satellite range information

Platform:

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

The RANGE log contains the channel measurements for the currently tracked satellites. When using this log, please keep in mind the constraints noted along with the description.

It is important to ensure that the receiver clock has been set. This can be monitored by the bits in the Receiver Status field of the log header. Large jumps in pseudorange as well as Accumulated Doppler Range (ADR) occur as the clock is being adjusted. If the ADR measurement is being used in precise phase processing, it is important not to use the ADR if the "parity known" flag, in the ch-tr-status field, is not set as there may exist a half (1/2) cycle ambiguity on the measurement. The tracking error estimate of the pseudorange and carrier phase (ADR) is the thermal noise of the receiver tracking loops only. It does not account for possible multipath errors or atmospheric delays.

If multiple signals are being tracked for a given PRN, an entry for each signal, with the same PRN, appears in the RANGE logs. As shown in Table: Channel Tracking Status, these entries can be differentiated by bits 21-25, which indicate the signal type of the observation.

For dual antenna receivers, a RANGE_1 log can be requested to get RANGE 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 RANGEA_1, and for a binary log enter RANGEB_1.

Message ID: 43

Log Type: Synch

Recommended Input:

log rangea ontime 1

ASCII Example:

#RANGEA,USB1,0,54.0,FINESTEERING,2209,512449.000,02000020,5103,16809;154,

26,0,24101771.233,0.199,-126655684.482618,0.012,2806.247,44.4,853.017,1810dc04,

26,0,24101778.285,0.063,-98692757.083922,0.012,2186.688,44.3,852.637,11305c0b,

26,0,24101777.807,0.210,-98692761.337851,0.013,2186.688,43.9,852.897,0230dc0b,

26,0,24101777.726,0.048,-94580569.886827,0.007,2095.792,45.5,890.436,01d0dc04,

2,0,22499844.130,0.095,-118237471.207489,0.006,-2253.363,50.8,948.960,0810dc24,

2,0,22499844.354,0.042,-92133093.288779,0.006,-1755.868,47.8,905.245,01305c2b,

18,0,23410900.110,0.140,-123025123.733624,0.009,3172.589,47.4,948.419,0810dc44,

18,0,23410904.748,0.058,-95863754.520894,0.009,2472.151,45.0,905.239,01305c4b,

18,0,23410905.377,0.134,-95863750.778546,0.009,2472.152,47.8,908.359,0230dc4b,

...

11,0,21627872.790,0.045,-87086480.543534,0.004,-456.096,54.2,909.624,0034df64,

11,0,21627872.930,0.029,-91514607.194262,0.005,-479.336,49.8,908.797,0054df64,

14,0,25543595.901,0.066,-133012227.032812,0.013,3483.877,41.7,942.083,08149fc4,

14,0,25543601.865,0.118,-102853526.267150,0.008,2693.828,45.9,909.810,1034dfc4,

14,0,25543600.620,0.077,-108083356.036078,0.012,2830.744,41.4,909.024,0054dfc4,

23,0,24918187.158,0.026,-97784306.543904,0.005,-1719.866,50.8,904.036,0134dfe4,

23,0,24918183.473,0.056,-105436980.058879,0.008,-1854.495,44.1,908.614,0054dfe4

*b35a6012

Field

Field type

Description

Format

Binary Bytes

Binary Offset

1

Log header

RANGE header

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

 

H

0

2

# obs

Number of observations with information to follow 1

Ulong

4

H

3

PRN/slot

Satellite PRN number of range measurement

Refer to PRN Numbers

Ushort

2

H+4

4

glofreq

(GLONASS Frequency + 7) (see GLONASS Slot and Frequency Numbers section of this manual)

Ushort

2

H+6

5

psr

Pseudorange measurement (m)

Double

8

H+8

6

psr σ

Pseudorange measurement standard deviation (m)

Float

4

H+16

7

adr

Carrier phase, in cycles (accumulated Doppler range)

Double

8

H+20

8

adr σ

Estimated carrier phase standard deviation (cycles)

Float

4

H+28

9

dopp

Instantaneous carrier Doppler frequency (Hz)

Float

4

H+32

10

C/No

Carrier to noise density ratio

C/No = 10[log10(S/N0)] (dB-Hz)

Float

4

H+36

11

locktime

Number of seconds of continuous tracking (no cycle slipping)

Float

4

H+40

12

ch-tr-status

Tracking status (see Table: Channel Tracking Status and the example in Figure: Channel Tracking Example)

Ulong

4

H+44

13...

Next PRN offset = H + 4 + (#obs x 44)

variable

xxxx

32-bit CRC (ASCII and Binary only)

Ulong

4

H+4+
(#obs x 44)

variable

[CR][LF]

Sentence terminator (ASCII only)

-

-

-

 

Channel Tracking Example

 

Channel Tracking Status

Nibble

Bit

Mask

Description

Range Value

N0

0

0x00000001

Tracking state

0-23,

see Table: Tracking State

1

0x00000002

2

0x00000004

3

0x00000008

N1

4

0x00000010

5

0x00000020

SV channel number

(n-1) (0 = first, n = last)

n depends on the receiver

6

0x00000040

7

0x00000080

N2

8

0x00000100

9

0x00000200

10

0x00000400

Phase lock flag

0 = Not locked, 1 = Locked

11

0x00000800

Parity known flag

0 = Not known, 1 = Known

N3

12

0x00001000

Code locked flag

0 = Not locked, 1 = Locked

13

0x00002000

Correlator type

0-7,

see Table: Correlator Type

14

0x00004000

15

0x00008000

N4

16

0x00010000

Satellite system

0 = GPS
1 = GLONASS
2 = SBAS
3 = Galileo

4 = BeiDou
5 = QZSS
6 = NavIC
7 = Other

17

0x00020000

18

0x00040000

19

0x00080000

Reserved
 

20

0x00100000

Grouping

0 = Not grouped, 1 = Grouped

 

21

0x00200000

Signal type

(Dependent on satellite
system above)

 

GPS:
0 = L1C/A
5 = L2P
9 = L2P (Y), semi-codeless
14 = L5 (Q)
16 = L1C (P)
17 = L2C (M)

GLONASS:
0 = L1C/A
1 = L2C/A
5 = L2P
6 = L3 (Q)

BeiDou:
0 = B1 (I) with D1 data
1 = B2 (I) with D1 data
2 = B3 (I) with D1 data
4 = B1 (I) with D2 data
5 = B2 (I) with D2 data
6 = B3 (I) with D2 data
7 = B1C (P)
9 = B2a (P)
11 = B2b (I)

Galileo:
2 = E1 (C)
6 = E6B
7 = E6C
12 = E5a (Q)
17 = E5b (Q)
20 = E5AltBOC (Q)

QZSS:
0 = L1C/A
14 = L5 (Q)
16 = L1C (P)
17 = L2C (M)
27 = L6P

SBAS:
0 = L1C/A
6 = L5 (I)

NavIC:
0 = L5 SPS

Other:
19 = L-Band

N5

22

0x00400000
 

23

0x00800000
 

24

0x01000000

N6

25

0x02000000
 

26

0x04000000

Reserved
 

27

0x08000000

Primary L1 channel

0 = Not primary, 1 = Primary

N7

28

0x10000000

Carrier phase measurement 2

0 = Half Cycle Not Added
1 = Half Cycle Added

29

0x20000000

Digital filtering on signal

0 = No digital filter
1 = Digital filter

30

0x40000000

PRN lock flag 3

0 = PRN Not Locked Out
1 = PRN Locked Out

31

0x80000000

Channel assignment

0 = Automatic, 1 = Forced
Tracking State

State

Description

0

Idle

1

Sky search

2

Wide frequency band pull-in

3

Narrow frequency band pull-in

4

Phase lock loop

6

Channel steering

7

Frequency lock loop

9

Channel alignment

10

Code search

11

Aided phase lock loop

23

Side peak detection

24

FFT sky search
Correlator Type

State

Description

0

N/A

1

Standard correlator: spacing = 1 chip

2

Narrow correlator: spacing < 1 chip

3

Reserved

4

Pulse Aperture Correlator (PAC)

5

Narrow PAC

6

Multipath Estimation and Correction (MEC)
RINEX Mappings

GNSS System

Frequency Band

Frequency

Observation Codes

RINEX Phase Shift

Signal Type

Pseudo Range

Carrier Phase

Doppler

Signal Strength

GPS

L1

1575.42

L1CA

C1C

L1C

D1C

S1C

0

L1C(P)

C1L

L1L

D1L

S1L

0.25

L2

1227.6

L2C(M)

C2S

L2S

D2S

S2S

-0.25

L2P

L2P

C2P

D2P

S2P

0

L2P(Y)

C2W

L2W

D2W

S2W

0

L5

1176.45

L5(Q)

C5Q

L5Q

D5Q

S5Q

-0.25

GLONASS

G1

1598.0625-1609.3125

L1CA

C1C

L1C

D1C

S1C

0

G2

1242.9375-1251.6875

L2CA

C2C

L2C

D2C

S2C

0

L2P

C2P

L2P

D2P

S2P

0.25

G3

1202.025

L3(Q)

C3Q

L3Q

D3Q

S3Q

0.25

Galileo

E1

1575.42

E1C

C1C

L1C

D1C

S1C

0.5

E5a

1176.45

E5a(Q)

C5Q

L5Q

D5Q

S5Q

-0.25

E5b

1207.14

E5b(Q)

C7Q

L7Q

D7Q

S7Q

-0.25

E5(E5a+E5b)

1191.795

E5AltBOC(Q)

C8Q

L8Q

D8Q

S8Q

-0.25

E6

1278.75

E6B

C6B

L6B

D6B

S6B

0

E6C

C6C

L6C

D6C

S6C

-0.5

SBAS

L1

1575.42

L1CA

C1C

L1C

D1C

S1C

 

L5

1176.45

L5(I)

C5I

L5I

D5I

S5I

 

QZSS

L1

1575.42

L1CA

C1C

L1C

D1C

S1C

0

L1C(P)

C1L

L1L

D1L

S1L

0.25

L2

1227.6

L2C(M)

C2S

L2S

D2S

S2S

0

L5

1176.45

L5(Q)

C5Q

L5Q

D5Q

S5Q

-0.25

L6

1278.75

L6(P)

C6L

L6L

D6L

S6L

0

BeiDou

B1

1561.098

B1(I)

C2I

L2I

D2I

S2I

0

B1C

1575.42

B1C(P)

C1P

L1P

D1P

S1P

0.25

B2

1207.14

B2(I)

C7I

L7I

D7I

S7I

0

B2a

1176.45

B2a(P)

C5P

L5P

D5P

S5P

0.25

B2b

1207.14

B2b(I)

C7D

L7D

D7D

S7D

0

B3

1268.52

B3(I)

C6I

L6I

D6I

S6I

0

NavIC

L5

1176.45

L5SPS

C5A

L5A

D5A

S5A

0