NAVSYNC CW25 User Manual - page 22
CW25 Software User Manual
Page
22 of 50
Rev 03
Date: 06/16/08
Copyright ©2007 NavSync Ltd.All Rights Reserved
Specifications subject to change without notice.
8.2.1.10 POLYS - Satellite Status
$POLYS,GT{,ID,s,AZM,EL,SN,LK}{,ID,s,AZM,EL,SN,LK}{,ID,s,AZM,EL,SN,LK}{,ID,s,AZM,EL,SN,
LK}{,ID,s,AZM,EL,SN,LK}{,ID,s,AZM,EL,SN,LK}{,ID,s,AZM,EL,SN,LK}{,ID,s,AZM,EL,SN,LK}{,ID,
s,AZM,EL,SN,LK}{,ID,s,AZM,EL,SN,LK}{,ID,s,AZM,EL,SN,LK}{,ID,s,AZM,EL,SN,LK}*cs
Note: {} designate optional sections that appear only if there is satellite data
Name
Description
$POLYS
Navsync Proprietary NMEA sentence header (Satellite Data)
GT
Number of GPS satellites tracked
ID
Satellite PRN number (1-32)
s
Satellite status
- = not used
U = used in solution
e = available for use, but no ephemeris
AZM
Satellite azimuth angle (range 000 - 359 degrees)
EL
Satellite elevation angle (range 00 - 90 degrees)
SN
Signal to noise ratio in (range 0 - 55 dB/Hz)
LK
Satellite carrier lock count (range 0 - 255 seconds)
0 = code lock only
255 = lock for 255 or more seconds
cs
Message checksum in hexadecimal
8.2.1.11 POLYI, Additional Information Message
$POLYI,JN,jammer,EXT{,efields},INT{,ifields},BLANK*cs
Note: More than one {efield} or {ifield} may be present, each separated by commas.
Name
Description
$POLYI
Navsync Proprietary NMEA sentence header (Additional Information)
JN
Fixed descriptor field
jammer
Detected Jammer to Noise Ratio [dB/Hz]
EXT
Fixed descriptor field, indicates the use of externally provided ancillary measurements e.g.
received from Network Assistance. All comma separated fields following, up to the INT field
descriptor, are externally provided measurements
efields
DIFF = Differential Inputs
TSYNC = Time synchronisation
CLKB = Clock Bias
FREQ = Frequency (of reference oscillator)
HPOS = Horizontal position
VPOS = Vertical Position (altitude)
VVEL = Vertical Velocity
DIST = Distance Moved
SPEED = Current Speed
TRACK = Current track
DTRACK = Delta track (change in direction)
INT
Fixed descriptor field, indicates the use of internally provided ancillary measurements e.g.
retrieved from non volatile memory. All comma separated fields following, are internally
provided measurements
ifields
TSYNC = Time synchronisation
CLKB = Clock Bias
FREQ = Frequency (of reference oscillator)
HPOS = Horizontal position
VPOS = Vertical Position (altitude)
VVEL = Vertical Velocity
DIST = Distance Moved
SPEED = Current Speed
TRACK = Current track
DTRACK = Delta track (change in direction)
BLANK
Reserved for future use
cs
Message checksum in hexadecimal