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5.2 RTCM Received Data
The default communication parameters for DGPS Input are 9600 baud, 8 data bits, stop bit, and no parity.
Position accuracy of less than 5 meters can be achieved with the GR-213 by using Differential GPS (DGPS)
real-time pseudo-range correction data in RTCM SC-104 format, with message types 1,2, or 9. As using
DGPS receiver with different communication parameters, GR-213 may decode the data correctly to generate
accurate messages and save them in battery-back SRAM for later computing.
6. Earth Datums
6.1 Earth Datums
The following is a list of the GR-213 earth datum index and the corresponding earth datum name:
Item Datum Reference Ellipsoid Data name
1 Adindan - Ethiopia Clarke 1880 Data1.dat
2 Afgooye – Somalia Krassovsky Data2.dat
3 Alaska, Conus – North American 1983 GRS 1980 Data3.dat
4 Albania – S-42 (Pulkovo 1942) Krassovsky 1940 Data63.dat
5 Argentina South American 1969 Data4.dat
6 Australia Australian – National Data70.dat
7 Bahrain – Ain el ABD 1970 International Data5.dat
8 Bangladesh Everest 1830 Data6.dat
9 Bolivia South American 1969 Data8.dat
10 Botswana – ARC 1950 Clarke 1880 Data7.dat
11 Brazil South American 1969 Data9.dat
12 Brunel, East Malaysia Everest (Sabah & Sarawak) Data37.dat
13 Canada – North American 1983 GRS 1980 Data10.dat
14 Chile South American 1969 Data13.dat
15 Colombia South American 1969 Data12.dat
16 Colombia – Provisional American 1956 International Data11.dat
17 Czechoslovakia – S-42 (Pulkovo 1942) Krassovsky 1940 Data64.dat
18 Ecuador South American 1969 Data14.dat
19 European 1950 – Central Regional Mean International Data29.dat
20 European 1950 – Cyprus International Data15.dat
21 European 1950 – Eastern Regional Mean International Data16.dat
22 European 1950 – Egypt International Data17.dat
23 European 1950 – Finland, Norway International Data18.dat
24 European 1950 – Greece International Data19.dat
25 European 1950 – Iran International Data20.dat
26 European 1950 – Italy (Sardinia) International Data21.dat
27 European 1950 – Italy (Sicily) International Data22.dat
28 European 1950 – Malta International Data23.dat
29 European 1950 – Northern Regional Mean International Data24.dat
30 European 1950 – Portugal, Spain International Data25.dat
31 European 1950 – Southern Regional Mean International Data26.dat
32 European 1950 – Tunisia International Data27.dat
33 European 1950 – Western Regional mean International Data28.dat
34 Guyana - South American 1969 South American 1969 Data30.dat
35 Hawaii-North American 1983 GRS1980 Data32.dat
36 Hong Kong International Data31.dat
37 Hu_Tsu_Shan Taiwan International Data33.dat
38 Hungary – S-42 (Pulkovo 1942) Krassovsky 1940 Data65.dat
39 Indian 1960 Everest 1830 Data34.dat
40 Ireland - 1965 Modified Airy Data35.dat
41 Kazakhstan – S-42 (Pulkovo 1942) Krassovsky 1940 Data65.dat
42 Kenya, Tanzania- ARC 1960 Clarke 1880 Data53.dat