For more details download text release notes on the firmware page: www.topcongps.com/software/firmware.html.
Topcon GPS Firmware Version 2.3 Released 11.21.2002
November 21, 2002
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Version 2.3 will implement enhanced support for in-Band Interference Rejection,
improvements in RTCM capabilities and performance enhancements in the RTK algorithms
for pseudorange measurements and ionosphere modeling.