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Chapter 5
5.3.11 POSITIONTYPE Set the Position Solution
This command sets the position filter to compute the position on either the GPS L1 or GPS L5 frequencies. You
can also obtain data from a specific frequency. Both position and navigation data are available on GPS L1 or
GPS L5. The ephemeris and almanac are decoded on the selected frequency.
When using simulated signals, if the L1 and L5 constellations are different, the receiver may drop signals that
are not in view based on the almanac. For example, if the receiver is tracking PRN 15 on L5, the position type
is set to GPSL1 and the L1 almanac indicates that PRN 15 is not in view, then the receiver stops tracking PRN
15.
To prevent this:
•
Use the ASSIGN command, see Page 50, to force lock on the satellites
•
Change the position type frequency with the POSITIONTYPE command, or
•
Ensure the constellations in the simulations agree with what you expect to track
This command only affects GPS satellites. Galileo satellites maintain their lock.
Syntax:
POSITIONTYPE
Field
Field
Name
1
header
2
frequency
Example:
POSITIONTYPE GPSL1
64
FREQUENCY
Valid Values
This field contains the Abbreviated ASCII command name. See Section
4.1 on Page 34.
GPSL1 or GPSL5
Table 28: Position Frequency Switch
ASCII
GPSL1
GPSL5
Description
Position frequency, see Table 28
Description
GPS L1 frequency
GPS L5 frequency
EuroPak-15ab Receiver User Manual Rev 1
Commands
Message ID: 836
Binary
Binary
Format
Bytes
Offset
H
0
Enum
4
H
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