Trimble Outdoors SK8 - Manual (Page 108)

A-44 Lassen-SK8 Embedded GPS Module
Trimble Standard Interface Protocol
A.17.39 Report Packet 0x59
Normally the GPS receiver selects only healthy satellites (based on transmitted values in
the ephemeris and almanac) which satisfy all mask values, for use in the position solution.
This packet allows you to override the internal logic and force the receiver to either
unconditionally disable a particular satellite or to ignore a bad health flag. The GPS
receiver returns Packet
0x 59 for operation modes 3 and 6 only. The data format is shown
below.
This information is not held in battery-backed memory. At power-on and after a reset, the
default values are set for all satellites.
Table A-47. Report Packet 0x59 Data Formats
Byte Item Type Value Meaning
0 Operation BYTE 3 The remaining bytes tell whether receiver
is allowed to select each satellite.
6 The remaining bytes tell whether the
receiver heeds or ignores each satellite's
health as a criterion for selection.
1 to 32 Satellite # 32 BYTES
(1 byte per
satellite) (Depends on byte 0 value.)
0 Enable satellite selection or heed
satellite's health. Default value.
1 Disable satellite selection or ignore
satellite's health.