NEXT PASS

Predict the next satellite overpass for a point, bounding box, or KML AOI — supporting Sentinel‑1, Sentinel‑2, Landsat‑8, Landsat‑9, and NISAR. Optionally filter by OPERA product families, estimate cloudiness for the upcoming pass, and email results.

Highlights

• Satellites: Sentinel-1, Sentinel-2, Landsat-8, Landsat-9, NISAR
• AOI inputs: Point (lat, lon), SNWE bounding box, or KML polygon
• OPERA product filters: limit search to product families (e.g., DSWX-HLS_V1, DSWX-S1_V1)
• Cloudiness prediction: for next S1/S2 overpasses (-c)
• Email notifications: send S1/S2 results via SMTP (--email)
• Examples included: examples/

Repo layout

next_pass/
├─ examples/          # Jupyter notebooks and sample workflows
├─ utils/             # Core helpers (Sentinel/Landsat passes, cloudiness, OPERA products, plotting, I/O)
├─ next_pass.py       # CLI entry point (used by the `next-pass` console script)
├─ environment.yml    # Conda/mamba environment for development and notebooks
├─ requirements.txt   # Runtime dependency list (used by pyproject / pip)
├─ pyproject.toml     # Modern packaging metadata (setuptools backend)
├─ setup.py           # Legacy shim for older tooling
└─ LICENSE            # Apache-2.0

Installation

Clone the repository:

git clone https://github.com/OPERA-Cal-Val/next_pass.git
cd next_pass

Create a fresh environment (recommended):

mamba env create -f environment.yml
mamba activate next_pass

or with conda

conda env create -f environment.yml
conda activate next_pass

Alternatively, install the runtime dependencies directly:

conda install -c conda-forge --yes --file requirements.txt

Install the package (optional but recommended)

pip install -e .

Usage

The main entry point is next-pass. Choose one AOI input form and add options as needed.

1) Point (lat, lon)

next-pass -b 34.20 -118.17

2) Bounding box (SNWE = South North West East)

next-pass -b 34.15 34.25 -118.20 -118.15

3) KML file (polygon)

next-pass -b /path/to/aoi.kml

4) WKT coordinates (polygon or point)

next-pass -b "POLYGON ((-123.1 47.33, -123.16 47.28, -123.33 47.33, -123.25 47.34, -123.19 47.32, -123.15 47.35, -123.1 47.33))"

5) link to .geojson file (online or local)

next-pass -b "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.dc03b8d7d3aa06ec27afb812ac02d6afa8b5f0ce.002.1"

next-pass -b AOI_from_url.geojson

Options

• Satellite subset (e.g., S1 only) and email the results:

  next-pass -b 50 52 -102 -100 -s sentinel-1 --email
  

• NISAR overpasses from the official NASA observation-plan KMZ:

  next-pass -b 34.15 34.25 -118.20 -118.15 -s nisar
  

• Restrict OPERA products considered during the search (space‑separated list):

  next-pass -b 29 31 -100 -97 -p DSWX-HLS_V1 DSWX-S1_V1
  

• Predict cloudiness for the next S1/S2 overpasses (adds a cloud estimate column):

  next-pass -b 29 31 -100 -97 -p DSWX-HLS_V1 DSWX-S1_V1 -c
  

• Generate old OPERA products for a previous event date (YYYY-MM-DD):

  next-pass -b 17.32 18.80 -78.61 -75.58 -f opera_search -d 2025-10-01
  

• Generate OPERA Products DRCS map using a UTC event date in format YYYY-MM-DDTHH:MM (Please consider replacing the date in the example with a recent event date):

  next-pass -b 17.32 18.80 -78.61 -75.58 -g 2025-11-18T01:00
  

Use -h/--help to see all flags and defaults.

Contributing

Issues and pull requests are welcome! If adding a new satellite, product family, or IO backend, please include a small example and a test (if applicable).

For development setup and code quality standards, see CONTRIBUTING.md.

License

Apache‑2.0 — see LICENSE.