Bad Elf Flex: Atlas L-Band Correction Service
Bad Elf Flex: Atlas L-Band Correction Service
Introduction
The Atlas L-Band satellite correction service provides decimeter accuracy without requiring cell service for users of the Bad Elf Flex GNSS receiver, offering increased positioning accuracy worldwide.
The service relies on GNSS data collected from approximately 200 base stations worldwide, which are processed at Control Centers. Corrections are then transmitted to strategically located geostationary satellites, which broadcast carrier-phase corrections over specific L-Band frequencies. Once convergence is achieved, the accuracy remains consistent, or even improves, as long as the receiver's antenna maintains a clear view of the sky.
Step-by-Step
Activation and Compatibility
To utilize the Atlas L-Band corrections, users must activate L-Band via a Bad Elf Flex token or Atlas subscription and select the L-Band option.
L-Band activation reduces battery life to approximately 7 hours. 
This service is compatible with the larger survey-grade Bad Elf Flex model and is NOT available for the Flex Mini.
Accuracy and Convergence:
Upon activation, the Atlas L-Band correction service provides users with approximately 4 cm to 10 cm RMS accuracy worldwide, facilitated by satellite corrections.
Convergence times may vary between 12 to 40 minutes, depending on the GNSS constellation's status, after which users can expect reliable positioning data collection with an unobstructed sky view. If connection is lost, the convergence period may be required to restart.
Operational Considerations:
Atlas L-Band correction service operates independently of the internet, utilizing satellite-based corrections. It's crucial to ensure a clear, unobstructed view of the sky during operation for optimal performance, especially to the south as the Atlas satellites are “parked” over the equator.
If in the Southern hemisphere, the north should be unobstructed.
While the service area covers the majority of the earth's landmass between +/- 75 degrees latitude, it may not be suitable for canopied areas due to longer convergence times and susceptibility to signal loss under tree cover.
An additional fee may be required for maritime use.