positional arguments:¶

dis_file

displacement time-series HDF5 file, i.e. timeseries.h5

options:¶

-h, --help

show this help message and exit

-g GEOM_FILE, --geomtry GEOM_FILE

geometry file including incidence/azimuthAngle.

-s TEC_SOL, --sol TEC_SOL, --tec-sol TEC_SOL

TEC solution center (default: jpl).

jpl - JPL (Final)

igs - IGS (Final) cod - CODE (Final)

Check more at:

https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/atmospheric_products.html

--tec-dir TEC_DIR

directory of downloaded GNSS TEC data (default: ${WEATHER_DIR}/GIM_IGS).

--update

Enable update mode.

--iono-file IONO_FILE

calculated LOS iono ramp time-series file.

GIM extraction:¶

Parameters to extract TEC at point of interest from GIM (mainly for impact demonstration).

-i {nearest,linear3d,linear2d}, --interp {nearest,linear3d,linear2d}

Interpolation method to grab the GIM value at the point of interest (default: linear3d).

--norotate

Rotate TEC maps along the longitude direction to compensate the correlation between the ionosphere and the Sun's position, as suggested by Schaer et al. (1998). For 'interp_method == linear3d' ONLY. (default: True).

--ratio SUB_TEC_RATIO

Ratio to calculate the sub-orbital TEC from the total TEC. Set to "adaptive" for seasonally adaptive scaling.

Based on equation (14) from Yunjun et al. (2022).

Set to "a value" within (0,1] for a fixed scaling E.g. 0.75 for TerraSAR-X (Gisinger et al., 2021)

0.90 for Sentinel-1 (Gisinger et al., 2021)

0.69 for Sentinel-1 (Yunjun et al., 2022)

references:¶

Yunjun, Z., Fattahi, H., Pi, X., Rosen, P., Simons, M., Agram, P., & Aoki, Y. (2022). Range Geolocation Accuracy

of C/L-band SAR and its Implications for Operational Stack Coregistration. IEEE Trans. Geosci. Remote Sens.

Schaer, S., Gurtner, W., & Feltens, J. (1998). IONEX: The ionosphere map exchange format version 1.1.

Paper presented at the Proceedings of the IGS AC workshop, Darmstadt, Germany, Darmstadt, Germany.

example:¶

iono_tec.py timeseriesRg.h5 -g inputs/geometryRadar.h5 iono_tec.py timeseriesRg.h5 -g inputs/geometryRadar.h5 -s cod