Trimble R12i Base Station Error in POSPac

Problem:

My TrueView or microdrones payload collected dark photos on a day with low natural light (early morning, late afternoon or a cloudy day). What can I do to solve the issue?

Picture showing dark photos from a flight
Photos taken with a mdLiDAR1000UHR payload on a day that was cloudy.
Picture showing the camera settings
Camera settings.

When reviewing the quality of the photos, it is a good practice to check the settings of the camera during the flight. If the ISO is 1600 and the photos are dark, this means that the default settings of the camera are not good enough for the light condition of your flight.

In this article we provide solutions for both issues, if you already collected data and/or if you are planning a flight in low light conditions.

Probable Resolution #1:

The flight was already performed, and the images are very dark. What can I do? There are 2 options:

  1. Leave the photos as they are, most photogrammetry software can auto adjust the color of the images before generating the orthomosaic. In this case, is recommended to raise the GSD of the orthophoto, since the image smear (blurriness) may be high.
  2. Use a 3rd party software and auto adjust the colors. This will improve the photos and provide something useful to identify features with the Image Explorer and with the colorization of the point cloud. Software like IrfanView can perform this task.

Probable Resolution #2:

I am planning to fly in low light conditions. Can I change the settings of the camera?
Please visit the following article to override the camera exposure


During sensor trajectory processing, POSPac fails with an unexpected error if a Trimble R12i base station T04 file is used, showing the error, “Error in 81196f9b39144c98ad71538c0c437545STDERR bpointID Parameter name Could not set the base station position because a station with ID DEFAULT was not found in the project. Batch error project … failed to process check log“.

Picture showing the Trimble R12i Base station
Trimble R12i Base station

Probable Resolution #1:

Disable the INS on the Trimble R12i

Before using the base station, disable the INS. Once that is done POSPac will accept the base station file in either the .T04 or RINEX format.

How to disable the INS:

Information extracted from the Trimble R12i user manual, page 43.

Receiver Configuration menu
Use the Receiver Configuration menu to configure such settings as elevation mask and
PDOP mask, the reference station position, the reference station name and code, and to
enable or disable INS.

Probable Resolution #2:

I am planning to fly in low light conditions. Can I change the settings of the camera?
Please visit the following article to override the camera exposure


Convert the Trimble R12i .T04 file to RINEX

The second option is to convert the .T04 file to RINEX. Once that is done POSPac will accept the base station file.

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