GSV - GPS Satellites in View

GSV - GPS Satellites in View

This command enables the GPGSV GPS Satellites in view message and determines the rate at which the information is transmitted. The periodic rate field (yyyy) instructs the receiver either to output this message once (polled), or to output this message at the indicated update rate (continuously). Once the receiver is set to continuous output, the continuous flow can be stopped by sending a one-time (polled) output request. The receiver will output the response one final time, and then terminate any further message outputs.

If the receiver is not tracking the satellite, the SNR field (ss) will be nulled. Further, an entire group — satellite ID field (ii), elevation field (ee), azimuth field (aaa), and SNR field (ss) — will be nulled if not needed.

NOTE

The SNR field (ss) is the same as the C/No value in the position/status/data message.

Input Command

• Set response message rate:

  $PMOTG,GSV,yyyyCC

  yyyy	update rate	0 .. 9999 seconds
  CC	optional checksum

Response Message

• Response to above command at selected rate:

  $GPGSV,t,m,n,ii,ee,aaa,ss,ii,ee,aaa,ss,ii,ee,aaa,ss,ii,ee,aaa,ss*C

  t	number of messages	1 .. 4
  m	message number	1 .. 4
  n	total number of satellites in view
  For each visible satellite (four groups per message)
  ii	satellite PRN number
  ee	elevation (degrees)	0 .. 90
  aaa	azimuth (degrees True)	0 .. 359
  ss	SNR (dB)	0 .. 99
  CC	checksum