CYGNSS Mission

Watch the CYGNSS mission launch! (16:40)

Air-launch of Pegasus XL, and stage-by-stage CYGNSS microsatellite deployment.

GRAPHIC: The CYGNSS mission team is comprised of scientists from the University of Michigan, Southwest Research Institute, Surrey Satellite Technology, U.S., L.L.C.


IEEE JSTARS journal accepts new CYGNSS team papers for special issue

The IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing recently sent out a call for papers for a special issue titled, “Cyclone Global Navigation Satellite System (CYGNSS) Early On Orbit Performance.”

Four papers from the CYGNSS science team have been accepted for publication and can be read here. Some of the most significant results pertain to wind speed measurement performance, which has been validated to have an uncertainty of 1.4 m/s below 20 m/s and 17% above 20 m/s.

To read the four papers, please go to:


Cyclone Global Navigation Satellite System (CYGNSS) Version 2.0 Science Data Records are now available at the NASA PO.DAAC.

Version 2.0 represents the first “post-provisional” release of the CYGNSS level 1, 2 and 3 science data products generated using calibrated processing algorithms which were trained and validated against intercomparison wind speed measurements made during the 2017 Atlantic hurricane season.

Version 2.0 supersedes the previous provisional data versions 1.1 and 1.0, and all data users moving forward are advised to use this latest version for fundamental science and applied research activities.

For more information, go to:

For detailed descriptions of the science data products, go to:


NASA’s Weather Prediction Project

The Cyclone Global Navigation Satellite System (CYGNSS) aims to improve extreme weather prediction.

CYGNSS will use a constellation of eight small satellites carried to orbit on a single launch vehicle. In orbit, CYGNSS’s eight micro-satellite observatories will receive both direct and reflected signals from Global Positioning System (GPS) satellites. The direct signals pinpoint CYGNSS observatory positions, while the reflected signals respond to ocean surface roughness, from which wind speed is retrieved.

The mission will study the relationship between ocean surface properties, moist atmospheric thermodynamics, radiation and convective dynamics to determine how a tropical cyclone forms and whether or not it will strengthen, and if so by how much. This will advance forecasting and tracking methods.

CYGNSS data will enable scientists, for the first time, to probe key air-sea interaction processes that take place near the inner core of the storms, which are rapidly changing and play large roles in the genesis and intensification of hurricanes.

The CYGNSS mission launched on December 15, 2016!

CYGNSS mission is comprised of 8 Low Earth Orbiting (LEO) spacecraft (S/C) that receive both direct and reflected signals from GPS satellites The CYGNSS mission is comprised of 8 Low Earth Orbiting (LEO) spacecraft (S/C) that receive both direct and reflected signals from GPS satellites.

CYGNSS Team (more)


CYGNSS Org Chart

CYGNSS Mission Fact Sheet

CYGNSS Mission Brochure

CYGNSS Mission Press Kit

CYGNSS is part of the
NASA Earth System Science Pathfinder program.

NASA Ames Research Center
University of Michigan
Southwest Research Institute of Texas
Surrey Satellite Technology of Colorado