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5-2 Preparing for PPP
For some online Precise Point Positioning (PPP) service, older RINEX 2.11 format data is required; a minor
modification on converted RINEX file may be needed. Follow below steps to prepare RINEX file for
sending to online PPP service.
1. Log and obtain RTCM data (see section 5-3)
2. Use v.2.4.3 RTKLib’s RTKCONV program to convert the logged RTCM data to RINEX 2.11. Select
proper constellations and frequency bands the online PPP service uses; will then get a RINEX format
file *.obs. See Figure 5-3 a.
3. Edit the output *.obs file, and modify the string “C2” to “P2” on about 13
th
line. See Figure 5-3 b.
a
b
Figure 5-3
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