Advanced Navigation Boreas D90 - GNSS Frequency Bitfields

Trimble BD992 GNSSReceiver Configuration Packet
Read / Write Read / Write
Field # Bytes Offset Data Type Size Description
1 0 u8 1 Permanent
2 1 u64 8 GNSS frequencies.This is a bitfield where each bit
describes whether a particular frequency is enabled.
For a list of the fields that are currently available, see
11.5.12.3 GNSSFrequency Bitfields.
3 9 fp32 4 PDOPthreshold - the Position Dilution of Precision to
achieve a fix
4 13 fp32 4 TDOPthreshold - The Time dilution of Precision to
achieve a fix
5 17 u8 1 Elevation mask (degrees) - Minimum elevation of the
satellite that will be used when calculating fix
6 18 u8 1 SNRMask (dB)- Signal-to-noise (SNR)ratio of a satel-
lite signal to allow it to be used when calculating a fix
7 19 u8 1 SBAScorrections enabled
8 20 u8 1 11.5.12.4 L Band Modes
9 21 u32 4 Lband frequency (Hz)
10 25 u32 4 Lband baud rate
11 29 u32 4 Primary antenna type
12 33 u32 4 Secondary antenna type
13 37 u8 1 11.5.12.5 L Band Satellite IDs - this refers to the satel-
lite name
14 38 47 Reserved
Table 152: Trimble BD992 GNSS Receiver Configuration Packet
11.5.12.3 GNSSFrequency Bitfields
Each GNSSfrequency is a field that contains 8 bits that indicate whether a particular frequency is enabled for a
constellation. These are boolean fields with a zero indicating false and a one indicating true. The table below
provides a description of each bit, which is a combination of a constellation name and its frequency.
Bit Description
0 GPS L1CA
1 GPS L1C
2 GPS L1P
3 GPS L2C
4 GPS L2P
5 GPS L2M
v1.2 Page 172 11 Oct 2022
Boreas Reference Manual • Advanced Navigation Packet Protocol