Users manual
Appendix A
Revision #:
A
Date:
07-14-15
Page
20
of
58
FIXMASK
–
Setting of Positioning and Satellite Mask
△
4
Format:
$PERDAPI , FIXMASK , mode , elevmask , Reserve1 , snrmask , Reserve2 [,
1
2
3
4
5
6
Prohibit SVs
(GPS)
, Prohibit SVs
(GLONASS)
, Prohibit SVs
(Galileo)
, Prohibit SVs
(QZSS)
, Prohibit SVs
(SBAS)]
*hh <CR> <LF>
7
8
9
10
11
Num
Contents
Range
Default
Remark
1
FIXMASK
-
-
Command Name
2
mode
USER
-
Fixed Value
3
elevmask
0 to 90
0
Elevation mask (in degree)
Only SVs whose age is within this threshold are used
in the position fix calculation.
4
Reserve1
0
0
Reserve field
5
snrmask
0 to 99
0
Signal level mask (in dB-Hz)
Only SVs above this mask are fixed.
6
Reserve2
0
0
Reserve field
7
Prohibit SVs
(GPS)
32BIT
(HEX)
0
GPS Satellite number mask
Each bit represents one SVID.
The GPS satellites indicated by this field are not used
in the position fix calculation. Lowest order bit means
SV=01. Highest order bit means SV=32.
△
4
8
Prohibit SVs
(GLONASS)
28BIT
(HEX)
0
GLONASS Satellite number mask
Each bit represents one SVID.
The GLONASS satellites indicated by this field are not
used in the position fix calculation. Lowest order bit
means SV=65. Highest order bit means SV=92.
△
4
9
Prohibit SVs
(Galileo)
20BIT
(HEX)
0
Galileo Satellite number mask
Each bit represents one SVID.
This field is unimplemented.
△
4
10
Prohibit SVs
(QZSS)
7BIT
(HEX)
0
QZSS Satellite number mask
Each bit represents one SVID.
The QZSS satellites indicated by this field are not
used in the position fix calculation. Lowest order bit
means SV=93. Highest order bit means SV=99.
△
4
11
Prohibit SVs
(SBAS)
19BIT
(HEX)
0
SBAS Satellite number mask
Each bit represents one SVID.
The SBAS satellites indicated by this field are not
used in fix. Lowest order bit means SV=33. Highest
order bit means SV=51.
△
4
