REFSTATION

Base station position and health

Platform:

OEM719, OEM729, OEM7500, OEM7600, OEM7700, OEM7720, PwrPak7, CPT7, CPT7700, SMART7

This log contains the ECEF Cartesian position of the base station as received through the RTCMV3 message. It also features a time tag, the health status of the base station and the station ID. This information is set at the base station using the FIX command and the DGPSTXID command. See Figure: The WGS84 ECEF Coordinate System for a definition of the ECEF coordinates.

The base station health, Field #6, may be one of 8 values (0 to 7). Values 0 through 5 indicate the scale factor that is multiplied with the satellite UDRE one-sigma differential error values. Below are values 0 to 5 and their corresponding UDRE scale factors:

  0: 1 (Health OK)     0.75     2: 0.5     3: 0.3     4: 0.2     5: 0.1

The base station health field only applies to RTCM base stations. A value of 6 means the base station transmission is not monitored and a value of 7 means that the base station is not working.

Message ID: 175

Log Type: Asynch

Recommended Input:

log refstationa onchanged

ASCII Example:

#REFSTATIONA,USB1,0,68.0,FINESTEERING,2211,233731.221,02000020,4e46,16809;00000000,-1632851.222,-3662162.724,4944899.271,0,NOVATELX,"K250"*380be9f1

Field	Field type	Description	Format	Binary Bytes	Binary Offset
1	Log header	REFSTATION header For information about log headers, see ASCII, Abbreviated ASCII or Binary.		H	0
2	status	Status of the base station information (see Table: Base Station Status)	Ulong	4	H
3	x	ECEF X value (m)	Double	8	H+4
4	y	ECEF Y value (m)	Double	8	H+12
5	z	ECEF Z value (m)	Double	8	H+20
6	health	Base station health, see the description at the start of this section	Ulong	4	H+28
7	stn type	Station type (see Table: Base Station Type)	Enum	4	H+32
8	stn ID	Base station ID	String[5]	4 or 81 In the binary case, each string field needs to be NULL terminated and additional bytes of padding added to maintain 4-byte alignment. The next defined field starts immediately at the next 4-byte alignment following the NULL.	H+36
9	xxxx	32-bit CRC (ASCII and Binary only)	Ulong	4	H+40 or H+44
10	[CR][LF]	Sentence terminator (ASCII only)	-	-	-

Base Station Status

Bit #	Mask	Description	Bit = 0	Bit = 1
0	0x00000001	Validity of the base station	Valid	Invalid

Base Station Type

Binary	ASCII	Description
0	NONE	Base station is not used
1 - 3	Reserved
4	RTCMV3	Base station is RTCMV3

The REFSTATION log can be used for checking the operational status of a remotely located base station. You can verify that the base station is operating properly without traveling to it. This is especially useful for RTK work on long baselines.