L3Harris NARDA AMS-8061 User Manual page 209

The 16 bit figure named Longitude Fract is shown as follows:
D15 D14 D13 D12 D11 D10 D9
Byte
23/24
The figure named Longitude Fract is a little-endian unsigned 16 bit integer and indicates the
fractionary part of the GPS Longitude and it is expressed in Ten-thousandths of a minute.
Merging the previous data Longitude int and this figure the full Longitude can be obtained.
If, for example, Longitude int=0x0809 and Longitude Fract=0x16b3 then the GPS Longitude would
be: 8 degree, 09.4777 minute East.
Note that position is valid only when Flag V of Latitude int is zero.
The figure named NOB is shown as follows:
OldData
D07
Byte 25 Flag
NOB is a 5 bit unsigned integer which indicates how many bands have been measured and present in
the current period. Based on this figure, starting from the 33
follow.
If NOB is out of the allowed range (1-20), such in case of an empty record, NOB should be considered
to be 0 (no bands recorded) and thus the 33
OldData is a bit which flags whether the following data are still the same or are fresh ones.
When OldData is 0 then data have been updated since the previous record otherwise, OldData is '1',
data have not completely updated yet. The latter is the case when the energy is low and the measuring
process is reduced in rate to save power.
D07
Byte 26
D15 D14 D13 D12 D11 D10 D9
Byte
27/28
D15 D14 D13 D12 D11 D10 D9
Byte
29/30
Ten thousandths of a minute
Reserved
D06 D05
rd byte is in fact the 1
D06 D05
D8 D7 D6 D5
D04 D03
5bit unsigned integer
rd byte, then 16 bytes for each band will
st byte of the next record.
Reserved
D04 D03
Reserved
D8 D7 D6 D5
Reserved
D8 D7 D6 D5
SMS Messages and Commands
D4 D3 D2 D1
NOB
D02 D01
D02 D01
D4 D3 D2 D1
D4 D3 D2 D1
D0
D00
D00
D0
D0
5-41