Navigation Processing

The first step of processing a project is to do process the GPS and Inertial Measurement Unit (IMU) data.

PosPAC

This is the procedure used for data processing from 2021 with the aplanex system. The user manual is available on the ​PML Sharepoint (internal access only)

Processing flight navigation data with POSPac

2022 only: Processing IPAS data (to use IMU mounted on Owl) here are the notes on processing: Processing IPAS data in 2022

IPAS TC

This was the procedure used for processing data up to 2019.

When using a basestation (standard procedure) the position must be verified first:

1. Base station position verification
2. IPASTC Processing

If IPAS TC does not give sufficiently high accuracy then we can use IPAS Pro + GrafNav to try and get an improved result. See Processing/IPASTC for what is meant by "sufficiently high accuracy".

• IPASPro Processing

For data collected in 2012 onwards we can use the .sol files generated above directly in the hyperspectral processing software. There is no need to create SBET files.

Base station issues

For information on how to convert the NERC-ARF Leica basestation to RINEX data see here

If there are no basestation data with the project then check here for possible places to download from.

If you find you need to do a Network Adjustment then look here for instructions how.

For limited information on converting base station formats check this page.

For downloading Iceland basestations: IcelandBasestations.

Older instructions for pre 2012

If you need to process navigation data for the hyperspectral instruments:

Due to problems with the applanix system in 2011, instead of processing the applanix navigation separately, we now convert the IPAS .sol generated above into an .sbet and use this, with appropriate changes to the boresight and lever arms.

To convert, go into IPAS and click Tools -> File Converter.

The old applanix instructions are here:

• Automatic Method
• Manual Method