Deluo TRISTAR25 - Manual (Page 22)

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22
4.2.1.2 EverMore Binary Input Message 0x81: Data Logging
See section 4.3
4.2.1.3 EverMore Binary Input Message 0x86: Set Elevation Mask
Purpose
Set the elevation mask for position computation. Satellites with elevation angle less than the
elevation mask angle will not be used for navigation solution.
Format
Byte # Contents Range Size Scale Unit
1 Message ID = 0x86 Unsigned byte
2 Elevation Mask 0 ~ 89 Unsigned byte degree
3 ~ 4 Reserved
4.2.1.4 EverMore Binary Input Message 0x87: Set DOP Mask
Purpose
Set various DOP masks, which are used to set accuracy limits on position output. If the
selected DOP mask is exceeded, new position-velocity-time solution is not calculated and last
valid solution is output instead.
When DOP Select (byte #2) is set to Auto, navigation solution is in 3D mode when PDOP
value is less than the PDOP Mask, navigation solution changes to 2D mode when PDOP value
is greater than the PDOP Mask and HDOP value is less than the HDOP Mask, position data is
flagged invalid when HDOP value is greater than the HDOP Mask.
Format
Byte # Contents Range Size Scale Unit
1 Message ID = 0x87 Unsigned byte
2 DOP Select
0 = GDOP mask
1 = Auto
2 = PDOP mask
3 = HDOP mask
4 = Don’t use mask
0 ~ 4 Unsigned byte
3 GDOP 1 ~ 99 Unsigned byte
4 PDOP 1 ~ 99 Unsigned byte
5 HDOP 1 ~ 99 Unsigned byte
6 ~ 8 Reserved