Thursday, March 7, 2024

The PO.DAAC is pleased to announce the availability of 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 geo-located 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 October 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 on PO.DAAC web portal. Users are recommended to download the data using the podaac-data-subscriber. We also encourage users to visit PO.DAAC Cloud Data Page for detailed information about how to access the data from NASA Earthdata Cloud. General information regarding the CYGNSS mission is available from the mission website.


RONGOWAI_L1_SDR_V1.0 (10.5067/RGOWA-S1A10)


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


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.

Comments/Questions? Please contact or visit the PO.DAAC on Earthdata Forum.