9
**Checksum Field: The absolute value calculated by exclusive-OR the 8 data
bits of each character in the Sentence,between, but excluding “$”
and “*”. The hexadecimal value of the most significant and least
significant 4 bits of the result are convertted to two ASCII characters
(0-9,A-F) for transmission. The most
significant
character
is
transmitted
first.
**<CR><LF>
: Hex 0D 0A
B). Navigation lnitialization ID
：
101 Parameters required for start
This command is used to initialize the module for a warm start, by providing current position
（
in X, Y, Z coordinates
）
,clock offset, and time. This enables the receiver to search for the
correct satellite signals at the correct signal parameters. Correct initialization parameters will
enable the receiver to acquire signals more quickly, and thus, produce a faster navigational
solution.
When a valid Navigation Initialization command is received, the receiver will restart using the
input parameters as a basis for satellite selection and acquisition.
Format
：
$PSRF101,<X>,<Y>,<Z>,<ClkOffset>,<TimeOfWeek>,<WeekNo>,<chnlCount>,<ResetCfg>
*CKSUM<CR><LF>
<X> X coordinate position
INT32
<Y> Y coordinate position
INT32
<Z> Z coordinate position
INT32
<ClkOffset> Clock offset of the receiver in Hz, Use 0 for last saved
value if available. If this is unavailable, a default
value of 75000 for GSP1, 95000 for GSP 1/LX will
be used.
INT32
<TimeOf Week> GPS Time Of Week
