Mitchell (Multi-GNSS)

metadata

Station Name: mchl (mchl00aus)

Location: Walhallow, Queensland, Australia

Ellipsoidal Coordinates:

  • Latitude: -26.359 degrees

  • Longitude: 148.145 degrees

  • Height: 534.591 meters

Station Page at Nevada Geodetic Laboratory

Archives: CDDIS, BKG-IGS, GA

Step 1: GNSS-IR

Generate SNR files for all four constellations over the three-year window. I use -orb gnss-gfz, which includes BeiDou, and -par 10 to use 10 parallel threads.

rinex2snr mchl00aus 2023 1 -doy_end 365 -year_end 2025 -archive ga -orb gnss-gfz -par 10

Set up analysis parameters with all GNSS signals enabled:

gnssir_input mchl -fr 1 20 5 101 102 201 205 206 207 208 301 302 305 306 307 308

Run gnssir across the window:

gnssir mchl 2023 1 -doy_end 365 -year_end 2025 -par 10

Step 2: Soil Moisture

Build tracks.json and vwc_tracks.json from the run’s results:

vwc_input mchl 2023 -year_end 2025

Estimate phase:

phase mchl 2023 1 -doy_end 365 -year_end 2025 -par 10

Run vwc. The code loops over every frequency in vwc_tracks.json and produces a VWC series per constellation. Plots are suppressed when run with multiple frequencies:

vwc mchl 2023 -year_end 2025

Run for a single frequency to show plots:

vwc mchl 2023 -year_end 2025 -fr 101

Results

Final VWC, one example frequency per constellation (clockwise from top-left: GPS L5, GLONASS L2, Galileo L5, BeiDou L2). GPS L2C (blue) is overlaid on every panel as a reference:

../_images/mchl_multi_gnss_vwc.png

Per-frequency output files land in $REFL_CODE/Files/mchl/vwc_outputs/<SIGNAL>/mchl_vwc_<SIGNAL>_24hr+0.txt.