PlanetiQ GNOMES-4 with World’s Most Accurate Weather Sensor Launched Aboard SpaceX Falcon 9

PlanetiQ GNOMES-4 with World’s Most Accurate Weather Sensor Launched Aboard SpaceX Falcon 9

PlanetiQ, an innovator of global atmospheric observing systems, has launched its fourth generation Radio Occultation (RO) measurement satellite, GNOMES-4, aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base in California. The satellite was successfully deployed into Low-Earth Orbit at 10:36 am PT on December 1, 2023.

GNOMES-4 is equipped with the world’s best weather sensor, a PlanetiQ-proprietary technology sensor called Pyxis, which enables PlanetiQ to offer the highest quality GNSS-RO data for enhanced weather forecasting and atmospheric research to both government and commercial customers, such as airlines, insurance, energy, agriculture and financial services. 

PlanetiQ data uniquely provides highly accurate global observations of the atmosphere and ionosphere measured via the company’s proprietary GNSS Radio Occultation (RO). The data produced are temperatures, pressures and water vapour readings, similar to what a weather balloon would produce, but adds the critical capability of obtaining data over the entire globe, not just land, for better initialization of the global weather forecasting models. GNOMES-4 is PlanetiQ’s next-generation RO measurement satellite, equipped with the company’s proprietary Pyxis sensor technology - the highest sensitivity GNSS-RO instrument ever flown. Pyxis produces over 2200 soundings per day.

Pyxis, a fourth-generation radio occultation (RO) sensor, is smaller, lighter, consumes less power, and has nearly three times the data collection capability than previous versions. Pyxis receives signals from all four worldwide GNSS constellations (GPS, GLONASS, Galileo, and Beidou), and is powerful enough to provide more than double the amount of data available from the next-best GPS-RO sensors currently in orbit. Pyxis also is capable of routinely probing down into the lowest layers of the atmosphere where severe weather occurs. PlanetiQ is the only system capable of profiling the thermodynamic state of the atmosphere with very high vertical resolution, precision, and accuracy routinely down to the surface under any weather conditions, over any type of surface, across the globe.

In September 2023, PlanetiQ was selected by NASA to supply their highest quality GNSS-Radio Occultation data to enhance capabilities in weather and atmospheric research. PlanetiQ was one of seven companies selected through NASA’s CSDA Program, which has allocated $476M for commercial data over the next five years. In July 2023, PlanetiQ began daily delivery to NOAA of their highest quality SNR GNSS-Radio Occultation data under NOAA’s IDIQ-2 operational Delivery Order-2. This data is used by NOAA to improve our environment and save lives with superior weather forecasting and atmospheric research.

Click here to learn more about GPS Radio Occultation.

Publisher: SatNow

GNSS Constellations - A list of all GNSS satellites by constellations


Satellite NameOrbit Date
BeiDou-3 G4Geostationary Orbit (GEO)17 May, 2023
BeiDou-3 G2Geostationary Orbit (GEO)09 Mar, 2020
Compass-IGSO7Inclined Geosynchronous Orbit (IGSO)09 Feb, 2020
BeiDou-3 M19Medium Earth Orbit (MEO)16 Dec, 2019
BeiDou-3 M20Medium Earth Orbit (MEO)16 Dec, 2019
BeiDou-3 M21Medium Earth Orbit (MEO)23 Nov, 2019
BeiDou-3 M22Medium Earth Orbit (MEO)23 Nov, 2019
BeiDou-3 I3Inclined Geosynchronous Orbit (IGSO)04 Nov, 2019
BeiDou-3 M23Medium Earth Orbit (MEO)22 Sep, 2019
BeiDou-3 M24Medium Earth Orbit (MEO)22 Sep, 2019


Satellite NameOrbit Date
GSAT0223MEO - Near-Circular05 Dec, 2021
GSAT0224MEO - Near-Circular05 Dec, 2021
GSAT0219MEO - Near-Circular25 Jul, 2018
GSAT0220MEO - Near-Circular25 Jul, 2018
GSAT0221MEO - Near-Circular25 Jul, 2018
GSAT0222MEO - Near-Circular25 Jul, 2018
GSAT0215MEO - Near-Circular12 Dec, 2017
GSAT0216MEO - Near-Circular12 Dec, 2017
GSAT0217MEO - Near-Circular12 Dec, 2017
GSAT0218MEO - Near-Circular12 Dec, 2017


Satellite NameOrbit Date
Kosmos 2569--07 Aug, 2023
Kosmos 2564--28 Nov, 2022
Kosmos 2559--10 Oct, 2022
Kosmos 2557--07 Jul, 2022
Kosmos 2547--25 Oct, 2020
Kosmos 2545--16 Mar, 2020
Kosmos 2544--11 Dec, 2019
Kosmos 2534--27 May, 2019
Kosmos 2529--03 Nov, 2018
Kosmos 2527--16 Jun, 2018


Satellite NameOrbit Date
Navstar 82Medium Earth Orbit19 Jan, 2023
Navstar 81Medium Earth Orbit17 Jun, 2021
Navstar 78Medium Earth Orbit22 Aug, 2019
Navstar 77Medium Earth Orbit23 Dec, 2018
Navstar 76Medium Earth Orbit05 Feb, 2016
Navstar 75Medium Earth Orbit31 Oct, 2015
Navstar 74Medium Earth Orbit15 Jul, 2015
Navstar 73Medium Earth Orbit25 Mar, 2015
Navstar 72Medium Earth Orbit29 Oct, 2014
Navstar 71Medium Earth Orbit02 Aug, 2014


Satellite NameOrbit Date
NVS-01Geostationary Orbit (GEO)29 May, 2023
IRNSS-1IInclined Geosynchronous Orbit (IGSO)12 Apr, 2018
IRNSS-1HSub Geosynchronous Transfer Orbit (Sub-GTO)31 Aug, 2017
IRNSS-1GGeostationary Orbit (GEO)28 Apr, 2016
IRNSS-1FGeostationary Orbit (GEO)10 Mar, 2016
IRNSS-1EGeosynchronous Orbit (IGSO)20 Jan, 2016
IRNSS-1DInclined Geosynchronous Orbit (IGSO)28 Mar, 2015
IRNSS-1CGeostationary Orbit (GEO)16 Oct, 2014
IRNSS-1BInclined Geosynchronous Orbit (IGSO)04 Apr, 2014
IRNSS-1AInclined Geosynchronous Orbit (IGSO)01 Jul, 2013