Astronomy and Astrophysics – Astronomy
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spd....31.0215t&link_type=abstract
American Astronomical Society, SPD Meeting #31, #02.15; Bulletin of the American Astronomical Society, Vol. 32, p.813
Astronomy and Astrophysics
Astronomy
Scientific paper
GSFC's Solar EUV Research Telescope and Spectrograph (SERTS) is a rocket instrument that obtains imaged high-resolution spectra of individual solar features to study the Sun's corona and upper transition region. As with SERTS-97, an additional goal of the SERTS-99 flight on 1999 June 24 was to provide radiometric and wavelength calibrations for several experiments on the SOHO satellite mission. For that purpose, a second end-to-end radiometric calibration of SERTS was carried out last fall at RAL in the same facility used to characterize the SOHO/CDS experiment, using the same EUV light source specially re-calibrated by PTB against the synchrotron radiation standard of the BESSY-I electron storage ring. Measurements at a single SERTS aperture position were made to determine the instrument's absolute response within 25% at 12 wavelengths covering its bandpass of 300 -- 365 Angstroms. These were converted into full-aperture values through relative response measurements over a complete range of radial aperture positions. Also, post-flight wavelength calibrations were done at GSFC using well known laboratory lines of He II and Ne II. SERTS-99 again carried an EUV solar flux monitor kindly provided by USC; its readings were used to validate our calculations of atmospheric EUV transmission over the rocket's trajectory, and to provide an updated calibration for one of the SOHO/CELIAS channels. During the flight, SERTS-99 and CDS observed the same solar locations, as demonstrated by subsequent data co-registration with simultaneous SOHO/EIT images, allowing the SERTS calibrations to be directly applied to both CDS and EIT. Since it clearly resolves the strong Si XI and He II lines blended in EIT's 304 Angstroms channel, SERTS gives information on the spectral composition of those images as well. Examples of various cross-calibrations will be compared with results from November 1997, prior to SOHO's temporary loss of pointing control. This work is supported under NASA RTOP 344-17-38.
Davila Jose Manuel
Hollandt Jörg
Kent Barry J.
Thomas Robert J.
Thompson William T.
No associations
LandOfFree
Re-Calibration of SOHO by SERTS-99 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Re-Calibration of SOHO by SERTS-99, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Re-Calibration of SOHO by SERTS-99 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1348330