lstnet 0.2.0

LSTNet: pure-Python land surface temperature library (ground truth LST production refactor).

lstnet

Pure-Python land surface temperature (LST) ground-validation library + GUI.

lstnet computes ground-truth LST from in-situ longwave radiation at SURFRAD / PKULSTNet / HiWATER validation sites and validates it against retrieved LST (your own algorithm or a satellite product) — bias / RMSE / R + scatter and time-series plots. Zero system GDAL; cross-platform (Windows / macOS incl. Apple Silicon / Linux); MIT-licensed.

Networks: SURFRAD (7 US sites, served online by NOAA — the default, works out of the box) is the primary network. PKULSTNet (7) and HiWATER (11) readers are also included for users who hold those local datasets (they are not publicly downloadable — point the reader at your data/ directory).

Install

pip install lstnet

That's it — core library, GUI (lstnet-gui), and MCP server (lstnet-mcp) are all included.

For MODIS / ASTER GED emissivity sources, set NASA Earthdata credentials (never hardcoded):

export EARTHDATA_USERNAME=[e-mail]
export EARTHDATA_PASSWORD=********

Or enter them in the GUI: Settings → Earthdata Login (saved to ~/.lstnet/earthdata.json, chmod 600). Register at https://urs.earthdata.nasa.gov/users/new.

FixedEmissivity needs no credentials.

GUI usage

lstnet-gui        # launch the PySide6 desktop application

The GUI lets you:

1. Select sites (multi-select, with lon/lat shown) from SURFRAD / PKULSTNet / HiWATER.
2. Enter overpass times (12-digit YYYYMMDDHHMM, one per line, UTC).
3. Pick an emissivity source — ASTER GED (default, recommended for validation), MODIS daily, or a manual fixed value.
4. Compute ground LST — batch across all selected sites × times.
5. Validate — load a retrieved-LST CSV (site, overpass_time_utc, lst_k), the tool auto-computes ground truth for each row, pairs, and shows bias / RMSE / R + an embedded scatter plot (retrieved vs ground, 1:1 line).
6. Export the enriched CSV (retrieved LST + ground LST + diff + emissivity).

Sample data is in samples/:

• retrieved_sample.csv — 9-site multi-network demo (SURFRAD ×7 + HiWATER ×2).
• validation_template.csv — all 25 sites pre-filled (fill in time + your LST).

Linux note: the GUI needs libxcb-cursor0:

sudo apt install -y libxcb-cursor0 libegl1 libgl1

Library usage (script / notebook)

Compute ground-truth LST for one site/time:

from datetime import datetime, timezone
from lstnet import compute_ground_lst, FixedEmissivity
from lstnet.sites import get_site
from lstnet.io.surfrad import SurfradReader

site = get_site("psu")
t = datetime(2011, 2, 12, 14, 30, tzinfo=timezone.utc)
g = compute_ground_lst(site, t, FixedEmissivity(0.98), SurfradReader())
print(g.lst_k, g.qc_flag)   # e.g. 270.15 OK

Validate ground truth against your retrieved LST:

from lstnet import validate, TableRetrievedLST
from lstnet.plotting import scatter_plot

ground = [compute_ground_lst(s, t, FixedEmissivity(0.98), SurfradReader())
          for s, t in your_site_times]
result = validate(ground, TableRetrievedLST("your_retrieval.csv"))
print(result.stats.bias, result.stats.rmse, result.stats.r)
scatter_plot(result)   # retrieved-vs-ground with 1:1 line

your_retrieval.csv columns: site, overpass_time_utc, lst_k[, source] (overpass_time_utc = 12-digit YYYYMMDDHHMM or ISO 8601, UTC).

MCP server (AI agent integration)

lstnet-mcp        # start the FastMCP server

Exposes three tools that an AI agent (Claude Desktop, etc.) can call: list_sites, compute_lst, validate_csv.

Features

• Ground-truth LST from SURFRAD (NOAA, HTTPS) / PKULSTNet / HiWATER station data, at satellite overpass times (Stefan–Boltzmann radiance inversion).
• Emissivity sources: FixedEmissivity (offline), ModisDailyEmissivity (MYD21A1D/A1N C6.1, Ogawa 2004 broadband), AsterGEDEmissivity (AG100 V003 climatological, Cheng & Liang 2014 broadband — recommended for sub-K validation).
• Validation engine: pair ground-truth + retrieved LST by (site, overpass time) within a tolerance; bias / RMSE / Pearson R / regression; scatter + time-series plots.
• GDAL-free: MODIS HDF4 via pyhdf, ASTER GED HDF5 via h5py, GeoTIFF via rasterio — all ship pip wheels, no system GDAL install.
• Quality control (configurable strict), day/night (astral), credential externalization, CWD-independent paths.
• Cross-platform: tested on Windows / macOS / Linux via GitHub Actions CI.

Platform notes

Platform	Status	Notes
Linux	✅ Full	GUI needs libxcb-cursor0 libegl1 libgl1 (apt install)
macOS (Intel + Apple Silicon)	✅ CI green	Native Qt backend; no extra libs
Windows	✅ CI green	Native Qt backend; no extra libs

All binary dependencies (pyhdf, h5py, rasterio, PySide6) ship pip wheels for all three platforms — no compilation needed.

Citing

See CITATION.cff.

License

MIT — see LICENSE.