GNSS heading attitude record

The GNSS heading attitude record contains controls for two-antenna receivers such as the BD982.

The following table shows the additional records provided when the GNSS Heading Attitude record is included with Command Packet 64h.

Byte

Item

Type

Value

Notes

0

RECORD TYPE

1 (Char)

1Ah

GNSS Heading Attitude record.

1

RECORD LENGTH

1 (Char)

14h

Number of bytes in the record, excluding bytes 0 and 1.

2–5

HEADING CALIBRATION VALUE

4 (Float)

 

0.0 to 359.99999 degrees (do not use negative values).

6

HEADING REQUIRED SOLUTION

1 (Char)

 

3 = Require RTK Float or RTK Fixed
4 = Require RTK Fixed

7–10

SLOPE CALIBRATION VALUE

4 (Float)

 

-89.99999 to 89.99999 degrees.

11–18

RESERVED

8 (Char)

 

(Set to zeros.)

19

ORIENTATION

1 (Char)

 

0 = Unspecified (Pitch)
1 = Pitch
2 = Roll

20

FLAGS

1 (Char)

 

Bitmapped field of flags:

  • Bit 0: Apply heading adjustment to:
    • 0: only HDT will always use "Adjusted" heading
    • 1: All outputs will use "Adjusted" heading
  • Bit 1: Heading Direction
    • 0: secondary antenna to primary antenna
    • 1: primary antenna to secondary antenna
  • Bit 3: Attitude Direction
    • 0: secondary antenna to primary antenna
    • 1: primary antenna to secondary antenna