OpenFly for SatNav — Base initialization

This checkpoint is designed for use with SatNav, the continuous-state vision-and-language navigation platform for satellite maps. The SatNav OpenFly integration uses it to predict the next action from a language instruction, three RGB observations, and recent action history.

Model

  • Starting checkpoint: openvla/openvla-7b-prismatic with OpenFly processor assets
  • Training data: SatNav-v0.1 offline trajectories
  • Training: 1 epoch, full-parameter fine-tuning, learning rate 2e-5
  • Context: 3 RGB frames and up to 16 previous actions
  • Action format: stop, forward, left, and right

Repository name

  • openfly-satnav: OpenFly adapted to SatNav
  • scratch: base initialization from the OpenVLA checkpoint with OpenFly processor assets
  • 1ep: trained for one epoch
  • actcompact: predicts compact textual action labels
  • sample: the following fields describe trajectory-step sampling
  • hk7: keeps the first seven action steps
  • fs3: keeps every third step in a consecutive forward run; turning steps are kept
  • stopx2: repeats each stop sample twice
  • stopw0: labels only the terminal step as stop
  • tail5: keeps the final five steps before stop
  • stoph1: uses one history variant for each stop sample
  • hist16: includes up to 16 previous actions in the prompt
  • lr2e-5: uses a learning rate of 2e-5

Reference Results

Results reported in the SatNav paper, baseline comparison, row OpenFly.

SR, SPL, and OS are percentages. NE is measured in meters. Steps is the average number of executed environment actions, including turns and stop.

Split SR (%) SPL (%) OS (%) NE (m) Steps
Test Seen (val_seen) 13.2 13.0 33.5 166.88 58.93
Test Unseen (val_unseen) 11.7 11.6 32.2 195.91 66.35

Usage

Use this checkpoint with the SatNav OpenFly integration. It is also listed in the SatNav Baseline Model Zoo.

License

The checkpoint is released under MIT. OpenFly, OpenVLA, underlying model components, SatNav, and datasets remain subject to their respective terms.

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