NMEA-0183 message: PTNL,NMA

Applicable receivers: All receivers

Navigation Message Authentication (NMA) Status

This message is a Trimble-created message. It consists of the NMA status for the NMA source and for each signal type. Examples of the message string are:

$PTNL,NMA,2,1,2,0,4,01340000C2,0000000000,1,0,0600814C,00000000*7F

$PTNL,NMA,2,2,1,1,6,00000008000C0000,0000000000000000*09

PTNL,NMA message fields

NOTE – The PTNL,NMA message may exceed the NMEA-0183 standard of 80 characters.

Field	Meaning
0	Talker ID $PTNL
1	Message ID NMA
2	The total number of pages for this message
3	This page number (always 1 on the first page, then increments)
4	The number of NMA data in this page
The following fields are repeated up to the number in field 4:
5	NMA source: 0: OSNMA 1: RTX-NMA 2: QZNMA
6	Signal type: 0: GPS LNAV (L1 C/A) 1: GPS CNAV (L2) 2: GPS CNAV (L5) 3: GPS CNAV2 (L1C) 4: Galileo I/NAV (E1) 5: Galileo F/NAV (E1) 6: BeiDou LNAV (B1I) 7: QZSS LNAV (L1 C/A) 8: QZSS LNAV (L1 C/B) 9: QZSS CNAV (L5) 10: QZSS CNAV2 (L1C)
7	Authenticated SV bit mask (HEX): The authenticated mask will have a 1 for each satellite that is authenticated with the PRN offset by 1 (zero-based). For example, if only PRN 4 is authenticated via OSNMA, the mask will be: 0x00000008.
8	Failed SV bit mask (HEX): The failed mask will have a 1 for each satellite that is failed authentication with the PRN offset by 1. For example, if only PRN 4 is failed via OSNMA, the mask will be: 0x00000008.