GLMLA

NMEA GLONASS L1 C/A Almanac data

Platform:

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

This log outputs L1 C/A almanac data for GLONASS satellites. Multiple sentences are transmitted, one for each satellite.

The following relationships enable translation between the NMEA GLONASS satellite IDs, the NovAtel GLONASS PRN IDs, and the GLONASS slot numbers: NMEA GLONASS satellite ID = GLONASS slot number + 64 NovAtel GLONASS PRN ID = GLONASS slot number + 37 = NMEA GLONASS satellite ID - 27

Message ID: 859

Log Type: Asynch

Recommended Input:

log glmla onchanged

ASCII Example:

$GLMLA,23,01,65,0864,81,01f4,1e,96d9,0000,34bf42,129a60,0c37e8,001e0d,000,202*60

$GLMLA,23,02,66,0864,9c,0890,24,d8e6,0000,34c033,019183,16aac8,00285e,000,288*6E

$GLMLA,23,03,67,0864,85,0868,24,d5c3,0000,34c034,040255,188fa3,0024a2,000,20f*33

$GLMLA,23,04,68,0864,86,04e1,21,c31c,0000,34c047,066866,1a5cae,002bbc,000,225*30

$GLMLA,23,05,69,0864,81,02e0,22,d6dc,0000,34c05d,08cdb4,1c2bda,002c12,000,218*6F

$GLMLA,23,06,70,0864,9c,0175,20,7033,0000,34c01b,0b9ef4,1e7b43,001dac,000,00d*6F

$GLMLA,23,07,71,0864,85,074e,20,d48f,0000,34c021,0e0302,0fd5ff,0024ce,000,209*35

$GLMLA,23,08,72,0864,86,092c,1e,c79b,0000,34c03b,1051a4,0e14e5,0024f8,000,011*61

$GLMLA,23,09,73,0864,9e,06bf,56,f118,0000,34bfb2,120342,18a752,001077,000,20e*39

$GLMLA,23,10,74,0864,99,0675,57,077a,0000,34c013,0077c3,04b7a2,002068,000,016*36

$GLMLA,23,11,75,0864,80,01c7,56,d960,0000,34c012,02ffd6,02ca03,002685,000,20a*35

$GLMLA,23,12,76,0864,9f,03ec,55,ae43,0000,34bfb3,059c9f,00da9f,00216d,000,205*69

$GLMLA,23,13,77,0864,9e,023b,55,3cdc,0000,34c021,07f162,10f94a,002037,000,006*3E

$GLMLA,23,14,78,0864,99,020b,55,dc08,0000,34bfba,0a9208,12ef43,001ae9,000,207*65

$GLMLA,23,15,79,0864,80,02b6,56,c127,0000,34bfbf,0d03c1,14c440,001fcd,000,219*62

$GLMLA,23,16,81,0864,84,02b6,41,fbc5,0000,34bfb5,112438,02cf59,003ad4,000,28a*64

$GLMLA,23,17,82,0864,9d,0523,41,89a7,0000,34bfcc,137a8d,011221,0040c1,000,21f*62

$GLMLA,23,18,83,0864,83,00f3,48,3129,0000,34c009,01dd22,0e9ada,004642,000,031*67

$GLMLA,23,19,84,0864,82,0430,46,8255,0000,34bfc7,04b2bb,0c7533,004691,000,012*36

$GLMLA,23,20,85,0864,84,01da,43,6b28,0000,34bf81,0773a7,0a3509,003f61,000,04f*33

$GLMLA,23,21,86,0864,9d,095f,43,0cbb,0000,34bff6,09b474,0889a2,0043a5,000,030*37

$GLMLA,23,22,87,0864,83,021f,43,30bb,0000,34c0f6,0c8f05,065ccf,004357,000,00b*37

$GLMLA,23,23,88,0864,82,019d,43,cfaf,0000,34bfd2,0eb0d3,04bb13,002bc3,000,218*36

Refer to the GLONASS section of An Introduction to GNSS available on our website at novatel.com/an-introduction-to-gnss.

Field	Structure	Description	Symbol	Example
1	$GLMLA	Log header		$GLMLA
2	#alm	Number of NMEA almanac messages in the set	x.x	16
3	alm#	Current message number	x.x	13
4	slot	Slot number for satellite (65-96) The NMEA GLONASS PRN numbers are 64 plus the GLONASS slot number. Current slot numbers are 1 to 24 which give the range 65 to 88. PRN numbers 89 to 96 are available if slot numbers above 24 are allocated to on-orbit spares.	xx	85
5	N	Calendar day count within the four year period from the last leap year	x.x	1176
6	hlth & freq	Health and frequency for satellite Health and carrier frequency numbers are represented in this 2-character Hex field as:	hh	88
7	ecc	Eccentricity 1 The LSB of the Hex data field corresponds to the LSB of the word indicated in the Table 4.3 of the GLONASS Interface Control Document, 1995. If the number of available bits in the Hex field is greater than the word, the MSB (upper bits) are unused and filled with zeroes.	hhhh	01a6
8	ΔTdot	Rate of change of orbital period (s/orbital period2) 1	hh	0d
9	w	Argument of perigee (PZ-90.02) (radians)1	hhhh	9dc9
10	t16MSB	Clock offset, in seconds (s)1	hhhh	8000
11	ΔT	Correction to the mean value of the Draconian period (s/orbital period) 1	hhhhhh	34bff8
12	tπ	GLONASS Time of ascending node equator crossing (s)1	hhhhhhh	031887
13	l	Longitude of ascending node equator crossing (PZ-90.02) (radians)1	hhhhhhh	02da1e
14	Δi	Correction to nominal inclination (radians)1	hhhhhhh	002838
15	t12LSB	Clock offset (s)1	hhh	099
16	t	Coarse value of the time scale shift 1	hhh	242
17	xxxx	32-bit CRC (ASCII and Binary only)	Hex	*6D
18	[CR][LF]	Sentence terminator (ASCII only)	-	[CR][LF]