COSMIC-2

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Lua error in Module:Infobox at line 314: malformed pattern (missing ']'). COSMIC-2 also known as FORMOSAT-7, is the constellation of satellites for meteorology, ionosphere, climatology, and space weather research. FORMOSAT-7 is a joint US-Taiwanese project including National Space Organization (NSPO) on the Taiwanese side and the National Oceanic and Atmospheric Administration (NOAA) and the United States Air Force (USAF) on the US side. FORMOSAT-7 is the successor of FORMOSAT-3[6] The six satellites of the constellation were launched 25 June 2019 on a Falcon Heavy rocket.

Pre-launch

On 15 April 2019 the satellites were placed aboard a Taiwanese China Airlines cargo plane at Taoyuan International Airport. The six satellites were packed in three climate controlled transport crates. The satellites were shipped as diplomatic pouch to speed their journey through US customs, the first time a satellite had been shipped as such.[8]

Design

File:COSMIC-2 Cafeteria Cups Radio Occultation Antenna Array.png
The COSMIC-2 RO antenna prototype "Cafeteria Cups", fabricated out of 3D-printed FDM Ultem 9085, and inventor Dmitry Turbiner.

78% of components for the satellites were made in Taiwan.[9]

Radio-Occultation Payload

The primary payload for the COSMIC-2 Satellite is the Radio Occultation instrument.

This instrument is capable of measuring atmospheric effects by analyzing the propagation of GNSS signals through said atmosphere.

The instrument is composed of the Tri-band GNSS (TriG) RO and POD Receiver[10] and four Antennas:

  • Two Radio Occultation Arrays (the Cafeteria Cups Antenna) one Forward, one Aft
  • Two Precise Orbit Determination Antennas, one Forward, one Aft

Cafeteria Cups Antenna

Each RO Antenna is composed of three vertical sub-arrays, four elements each.[11]

Each element is a two-turn Helical Spiral. The collected signals from the four vertical elements are combined with a low loss beamformer.

The name 'Cafeteria Cups' comes from the fact that the antenna elements in the very first prototype were made out of plastic cups from the JPL cafeteria.

The Antenna is fabricated out of 3D Printed FDM Ultem 9085[12]. This makes the COSMIC-2 RO antenna the first 3D printed part on the outside of a Spacecraft to be qualified to NASA Class 2B Spaceflight.

See also

References

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External links

Template:Formosat

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  11. ↑ [1], "Phased antenna array for global navigation satellite system signals", issued 2013-06-25 
  12. ↑ Lua error in package.lua at line 80: module 'strict' not found.
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