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Information particular to respective items are on their individual product page. Common information for all models are on this Resources page. NavSpark products are under Development Boards category, NS-RAW product is under Additional Modules category.

NavSpark, NavSpark-BD, NavSpark-GL, NavSpark-mini User Guide (.pdf, ver 0.9)
NavSpark Progammer Guide (.pdf, ver 0.4)

Installation for Arduino IDE see section 10 of above User Guide

LEON3 BCC Compiler (sparc-elf-3.4.4)
Windows Version (.zip, ver 3.4.4)
Linux Version (.tar.gz, ver 3.4.4)

Additional Information
Windows GNSS Viewer Program (.zip, ver 2.0.397, 20191212)

GNSS Viewer User Guide (.pdf 20151224, last version GNSS Viewer for Venus8 based receiver)

NMEA Player (.zip, ver 2.0.382, 20190906)  

NMEA Player for PX1122R (.zip, ver 2.1.012, 20200508)

Binary Command Interface (.pdf, ver. 1.4.45, 20190411)

Raw Measurement Command Interface (.pdf, ver. 1.4.37, 20190614)

RTK Base Setup for Internet Access (.pdf, 20170414)

NavSpark Example Code Files (.zip, 20140522)

NavSpark Command Line Download Program Linux Source (.tar.gz, 20140530)

Venus822A Datasheet (.pdf)

LEON3 User's Manual (.pdf, related sections 1, 7, 38, 47, 48, 65, 69)

NMEA Format (.pdf)

RINEX Converter for NS-HP, NS-HP-GL (.zip, 20170329)

PL2303 USB to Serial Driver
Window Version (.zip, ver 1.9.0)