Efficient collocation of global navigation satellite system radio occultation soundings with passive nadir microwave soundings

Meredith, Alex; Leroy, Stephen; Halperin, Lucy; Cahoy, Kerri

doi:https://doi.org/10.5194/amt-16-3345-2023

Articles | Volume 16, issue 13

https://doi.org/10.5194/amt-16-3345-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-16-3345-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 16, issue 13

Research article

|

04 Jul 2023

Research article |

| 04 Jul 2023

Efficient collocation of global navigation satellite system radio occultation soundings with passive nadir microwave soundings

Alex Meredith, Stephen Leroy, Lucy Halperin, and Kerri Cahoy

Data sets

CDAAC GNSS Radio Occultation Datasets UCAR https://doi.org/10.5065/1k0w-2272

COSMIC-2 Data Products UCAR COSMIC Program https://doi.org/10.5065/t353-c093

Celestrak Satellite Catalog T. S. Kelso https://celestrak.org/satcat/search.php

Model code and software

alexmeredith8299/ro-nadir-collocation: Updated rotation method to match revised version of the paper (v1.0.1) A. Meredith https://doi.org/10.5281/zenodo.7320353

Short summary

We developed a new efficient algorithm leveraging orbital dynamics to collocate radio occultation soundings with microwave radiance soundings. This new algorithm is 99 % accurate and is much faster than traditional collocation-finding approaches. Speeding up collocation finding is useful for calibrating and validating microwave radiometers and for data assimilation into numerical weather prediction models. Our algorithm can also be used to predict collocation yield for new satellite missions.