TY - JOUR
T1 - Observations of the solar soft X-ray irradiance by the student nitric oxide explorer
AU - Bailey, Scott M.
AU - Woods, Thomas N.
AU - Eparvier, Francis G.
AU - Solomon, Stanley C.
PY - 2006
Y1 - 2006
N2 - The student nitric oxide explorer (SNOE) satellite made daily solar observations of the solar soft X-ray irradiance over most of the period from March 10, 1998 through March 16, 2002. Wavelengths below 30 nm, referred to as soft X-rays, were measured in broadband channels consisting of photodiodes with thin film filters deposited directly on the diode surfaces. SNOE had three such channels measuring in the bands 0.1-7, 6-19 , and 17-20 nm. The solar rotational (∼27-day) variability in these bands is 44%, 28%, and 14%, respectively, and the solar cycle (11-year) variability is approximately factors of 11, 6 and 5, respectively. The SNOE observations are compared to more recent observations by the TIMED SEE instrument which uses the same technique at similar levels of solar activity and are found to be larger by a factor nearing two. The SNOE observations are shown however to be in excellent agreement with the EUVAC empirical model of solar irradiance.
AB - The student nitric oxide explorer (SNOE) satellite made daily solar observations of the solar soft X-ray irradiance over most of the period from March 10, 1998 through March 16, 2002. Wavelengths below 30 nm, referred to as soft X-rays, were measured in broadband channels consisting of photodiodes with thin film filters deposited directly on the diode surfaces. SNOE had three such channels measuring in the bands 0.1-7, 6-19 , and 17-20 nm. The solar rotational (∼27-day) variability in these bands is 44%, 28%, and 14%, respectively, and the solar cycle (11-year) variability is approximately factors of 11, 6 and 5, respectively. The SNOE observations are compared to more recent observations by the TIMED SEE instrument which uses the same technique at similar levels of solar activity and are found to be larger by a factor nearing two. The SNOE observations are shown however to be in excellent agreement with the EUVAC empirical model of solar irradiance.
KW - Soft X-ray
KW - Solar irradiance
KW - Solar variability
UR - https://www.scopus.com/pages/publications/33644587930
U2 - 10.1016/j.asr.2005.07.039
DO - 10.1016/j.asr.2005.07.039
M3 - Article
AN - SCOPUS:33644587930
SN - 0273-1177
VL - 37
SP - 209
EP - 218
JO - Advances in Space Research
JF - Advances in Space Research
IS - 2
ER -