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Input Commands
2.5.5
Chapter 2
Request Ephemeris Data (ICD-GPS-200 Format) ID# 22
Each time a new request is sent, the receiver sends a complete set of ephemeris and SV clock data currently
acquired. In continuous mode, the GPS receiver sends a complete set only on receipt of a new ephemeris. See
also Message ID# 22 output on Page 86.
BYTE
1-4
BIT
DESCRIPTION
UNITS
TYPE
Header, see Section 1.2.2, Message Block Structure starting on Page 13
Checksum, see Section 1.6, Checksum
Calculation Rules starting on Page 19
5-6
N/A
Ushort
Example Input:
or:
2.5.6
Request Measurement Block Data ID# 23
This command requests measurement block data for all tracked SVs. See also Message ID# 23 output on Page
87. Sending this message in One Shot mode, turns it off and does not return any data. To start or to turn this
message back on, send it in Continuous mode.
BYTE
1-4
BIT
UNITS
TYPE
Header, see Section 1.2.2, Message Block Structure starting on Page 13
0-1
5
2-7
6-7
DESCRIPTION
Message rate (see notebox below)
0: 1 Hz
1: 2 Hz
2: 5 Hz
3: Reserved
N/A
Reserved (set to 0)
N/A
Checksum, see Section 1.6, Checksum
Calculation Rules starting on Page 19
N/A
Uchar
Ushort
This command is not available unless your receiver has Carrier Phase Output (CP) capability. See also
Appendix A, SUPERSTAR II Card Models, starting on Page 133.
The rate you choose must match that of your receiver. For example, if your receiver is capable of 1 Hz,
choose 1 Hz in byte 5 above. If your receive is capable of 5 Hz then you can choose 1, 2 or 5 Hz.
Example Input:
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