NASA’s Physical Oceanography Distributed Active Archive Center (PO.DAAC) released the Rongowai-CYGNSS Airborne Level 1 Science Data Record Version 1.0 dataset produced by the University of Auckland (UoA) Rongowai Science Payloads Operations Centre in New Zealand. The dataset contains the geolocated Delay Doppler Maps (DDMs) calibrated into Power Received (Watts) and Bistatic Radar Cross Section (BRCS) expressed in units of meters squared from the Delay Doppler Mapping Instrument onboard an Air New Zealand domestic Q300 (tail number ZK-NFA) flight.
The dataset starts from Oct. 27, 2022, and each data file corresponds to a single flight between airports within New Zealand (flight durations typically range between 45 min and 1hr 30min with a median of 7 flights/day) and measurements are reported at 1 second increments. Latency is approximately 1 day (or better) from the last recorded measurement time. Its primary parameters include the co- and cross-polarized Normalized Bistatic Radar Cross Section (NBRCS) of the specular point, the Leading Edge Slope (LES) of the integrated delay waveform and the normalized waveforms, as well as coherence detection and a coherence state metric. The data are distributed in netCDF-4 format and comply with CF/ACDD metadata conventions.
The Rongowai dataset and ATBD are accessible via the dataset landing page in the Earthdata catalog. Users are recommended to download the data using the podaac-data-subscriber. We also encourage users to visit the PO.DAAC Cloud Cookbook for detailed information about how to access the data from NASA Earthdata Cloud.
Citations
Rongowai Science Payloads Operations Centre. 2023. Rongowai Level 1 Science Data Record Version 1.0. Ver. 1.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/RGOWA-S1A10.
D. Moller, C. Ruf, R. Linnabary, A. O’Brien, and S. Musko, Operational airborne gnss-r aboard air new zealand domestic aircraft, in 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, pp. 1284–1287, 2021.
If you have questions, please contact PO.DAAC user services or visit PO.DAAC on Earthdata Forum.
Reference
D. Moller, C. Ruf, R. Linnabary, A. O’Brien, and S. Musko, Operational airborne gnss-r aboard air new zealand domestic aircraft, in 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, pp. 1284–1287, 2021.
If you have questions, please contact PO.DAAC user services or visit PO.DAAC on Earthdata Forum.