GeoOptics, Inc. operated the Community Initiative for Cellular Earth Remote Observation (CICERO) constellation of Earth observing nanosatellites from late 2018 to January 2022, provideding radio occultation data products from their Global Navigation Satellite Systems (GNSS) Radio Occultation (GNSS-RO) receivers.   The CSDA evaluation found that the GeoOptics-processed RO data are scientifically useful for data assimilation and other atmospheric (e.g., bending angle, temperature) and ionospheric (e.g., total electron density) science application.

Authorized Data Use and Users

All members of the U.S. Government and researchers funded by the U.S. Government have access to GeoOptics GNSS-RO products.

End User License Agreement

USG EULA

Obtaining Data

To request access to GeoOptics data available through NASA’s CSDA program please complete the CSDA Authorization form.

Copyright

Data products and derivatives must contain the following copyright markings (where YYYY is the year of the image acquisition):

• For GeoOptics, Inc data: “© GeoOptics, Inc., YYYY. All Rights Reserved.”
• For derivatives: "Includes copyrighted material of GeoOptics, Inc., All Rights Reserved.”
• A joint copyright notice may be used as appropriate

Authorized users should send GeoOptics a courtesy copy of any publications that include the downloaded data.

CSDA Acknowledgment

To help CSDA identify your publications, we request that you include the following acknowledgment when publishing work created using these data:

"This work utilized data made available through the NASA Commercial Satellite Data Acquisition (CSDA) program."

Evaluation

Details of the CSDA assessment efforts can be found in the GeoOptics Principal Investigator Evaluation Summary and the GeoOptics Radio Occultation Data Quality Assessment Report.

GeoOptics Commercial Data

CSDA acquired data from GeoOptics from January 2020 to April 2021. Below are the products acquired by CSDA that are available to authorized users. 

Processing Levels	Data Product
Level 0*	Raw open loop/close-loop phase & attitude measurements
Level 1a	Antenna Parameters (podObs)
	LEO attitude data (leoAtt)
	RO datasets, high rate 50 Hz (opnGns)
Level 1b	LEO POD data (cicPOD, orbits and clock biases)
	Atmospheric excess phase (cicPrf, cicPOD)
	Signal-to-Noise Ratio (opnGns, cicPOD)
Level 2 (Atmospheric Data)	Bending angle, refractivity, dry pressure and dry temperature (cicPrf)
	Water vapor, temperature and pressure (1DVar)
	BUFR data
Level 2 (Ionospheric Data)	occTec (TEC at a negative elevation angle from POD antenna)
	podTec (TEC at a positive elevation angle from POD antenna)