HESSI (original) (raw)


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HESSI


Part of SA-200


HESSI
HESSI
Credit: Manufacturer Image

American solar satellite. HESSI, the sixth Small Explorer, was a Spectrum Astro satellite derived from the SA-200S design. It carried a rotating modulation collimator transform telescope. Solar observatory satellite built by Spectrum Astro for NASA, USA. Launched 2002. Used the SA-200B (modified), spin stabilized bus.

AKA: SA-200S. Status: Operational 2002. First Launch: 2002-02-05. Last Launch: 2002-02-05. Number: 1 . Gross mass: 304 kg (670 lb).

The satellite rotated at 15 rpm, imaging hard X-ray flares from the Sun by reconstructing the Fourier components from the time modulation of the flux through a set of 9 grids each 9 cm in diameter. It was expected to make images with a resolution of 2 arcseconds at 40 keV energies and 36 arcseconds at 1 MeV energies. Launch delays meant HESSI missed some of the best flares at solar max.

NASA NSSDC Master Catalog Description

RHESSI (Ramaty High Energy Solar Spectroscopic Imager) is an American (NASA) solar flare observatory that was launched at 20:58 UT on 5 February 2002 by a Pegasus XL rocket which was released from a L-1011 aircraft flying out of the Cape Canaveral AFS. The 293 kg (with fuel), 414 W, 2.2 m (height) x 1.1 m (width) satellite is equipped to image at high resolution solar flares in X-rays and gamma rays. Onboard memory is 4 Gbytes, and telemetry rate is 3.5 Mbits/s. A PDMP exists for archiving the data at the NSSDC.


More at: HESSI.


Family: Astronomy, Solar. Country: USA. Launch Vehicles: Pegasus, Pegasus XL. Launch Sites: Mayport DZ. Agency: NASA. Bibliography: 2, 3765, 3766, 4, 552, 554, 6557, 12536.



2002 February 5 - . 20:58 GMT - . Launch Site: Cape Canaveral. Launch Complex: Mayport DZ. Launch Pad: 29.0 N x 78.5 W. Launch Platform: L-1011. LV Family: Pegasus. Launch Vehicle: Pegasus XL.



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