# Frequently asked questions

> Source: https://topodrone.com/knowledge/dji-mavic-3-enterprise/frequently-asked-questions/
> Section: DJI Mavic 3 Enterprise user manual
> Updated: 2026-10-02

## DJI Mavic 3 Enterprise photos have dark corners.

This is a feature of the DJI Mavic 3 Enterprise lens when lens distortion correction is disabled; it is not a technical fault. To remove the dark corners, you can enable distortion correction, but the data accuracy will then be lower, so enabling it is not recommended.

## Why don't I need to enter GNSS antenna offsets in TOPODRONE Post Processing, unlike other TOPODRONE products?

The offsets are already written in the structure of the \*.mrk file that the drone creates during the aerial survey route. Entering antenna offsets is not required.

## Why is there no \*.mrk file in the route folder when using the DJI Mavic 3 Enterprise in RTK mode?

In RTK mode, the high-precision coordinates of the photo centers are written to the EXIF data of the photos, and the \*.mrk file is not written to the route folder. Without this file, PPK post-processing is impossible. Therefore, to post-process data by the PPK method, fly with the GNSS RTK antenna installed but with RTK corrections disabled.

## What do the abbreviations mean?

| PPK   RTK   PSDK   RTH   Battery   VPS   Li-Ion   Li-Po   GSD        GCP   GPS   GLONASS   BDS   BS   PC | Post Processing Kinematic   Real Time Kinematic   Payload Software Development Kit – modular payload connector   Return-to-Home – the procedure of returning the drone to the home point   Rechargeable battery   Vision Positioning System of the drone, usually mini cameras   Lithium-Ion battery technology   Lithium-Polymer battery technology   Ground Sample Distance – ground resolution of the image   Ground Control Point   Global Positioning System (USA)   Global Navigation Satellite System (Russia)   BeiDou Navigation Satellite System (China)   Base Station – a GNSS receiver logging raw GNSS data   Personal Computer: laptop or workstation |
| --- | --- |

## Why does the M3E battery charge slowly even from a power supply that supports fast charging?

Use only the original 100 W charger to charge the batteries. Third-party chargers may not have enough power. The minimum power supply output for fast charging is 65 W.

## What factors sharply degrade the radio link?

- Wrong relative orientation of the remote controller and drone antennas;
- No line of sight between the remote controller and the drone;
- Interference on the 2.4 GHz control frequency (Wi-Fi or jammers);
- Coniferous forest or branches between the drone and the remote controller;
- The pilot being in a car or a room with metal walls.

> **Warning:** The battery charge level does not affect the radio range between the remote controller and the drone

## What factors sharply degrade the accuracy of the final materials?

- Wrong camera image settings: blur, overexposure / underexposure;
- Wrong focus in the photos: the image is not sharp;
- Higher flight altitude and GSD linearly degrade accuracy;
- Interference on the GNSS signal frequency (obstacles, jammers);
- Incorrect installation and logging settings of the base station;
- A distance of more than 10 km between the base station and the M3E flight area.

## The images came out too dark. Can they be batch-processed in graphics software to increase exposure?

It is strongly recommended not to change or edit the photos in any way. You will not get better quality, since re-encoding the \*.jpeg adds extra noise.

## Can photos be saved in \*.RAW format?

This is possible, but it takes 3-4 times more space on the memory card and the PC disk and more post-processing time. In the end, \*.RAW does not noticeably improve the quality of the final materials. It is not used in real projects and is not recommended.

## Why is the recommended minimum exposure time 1/2000 s?

The M3E mechanical shutter cannot work faster than 1/2000 s. Aerial photography with the electronic and mechanical shutter at the same time slightly reduces accuracy and is not recommended.