The space radiation environment in the low earth orbit measured by the Daichi satellite

Details The space radiation environment in the low earth orbit measured by the Daichi satellite The space radiation environment in the low earth orbit measured by the Daichi satellite

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm51a1334k&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM51A-1334

Other

[7984] Space Weather / Space Radiation Environment

Scientific paper

The Technical Data Acquisition Equipment (TEDA) on board the Daichi satellite (Advanced Land Observing Satellite: ALOS) was launched on 24 January 2006, and has been operated in low earth orbit at 700 km altitude with 98 degree inclination. The TEDA consists of the Light Particle Telescope (LPT) for measurements of energetic electrons, protons, and alpha-particles, as well as the Heavy Ion Telescope (HIT) for observations of energetic ions from helium to iron. The LPT has a capability to measure electrons in the energy range from 0.1 MeV - 4 MeV in 14 bins, protons from 2 MeV to 34 MeV in 22 bins, and alpha-particles from 11 MeV to 137 MeV in 16 bins with 1-second temporal resolution. The LPT can also distinguish nuclei of hydrogen and helium isotopes, namely, nucleus of hydrogen/deuterium/tritium and 3He/4He. In the low earth orbit, the proton radiation environment is composed of the SAA (South Atlantic Anomaly) region that is settled by the combination of the distribution of geomagnetic field and trapped protons in the inner radiation belt, and the proton components in galactic cosmic rays that distribute along with the geomagnetic cut-off rigidity distribution. The electron radiation environment has also the horn region that is the foot point of the outer radiation belt as well as those two components. The operation period of the Daichi satellite corresponds to the solar-activity minimum period. Thus, the space radiation environment around the Daichi satellite has been almost stable. However, large solar flares followed by CMEs occurred in December 2006, and disturbed the space radiation environment in the orbit of the Daichi satellite. The enhancements of proton and electron flux due to the solar event were measured in this period both in the polar and the horn regions. In addition, high speed solar wind often flowed during the operation period of the Daichi satellite. The modulation of electron flux due to the solar wind variations was measured in the horn region all through the operation period. On the other hand, a little variation was seen in the SAA region. In this paper, the space radiation environment in low earth orbit measured by the Daichi satellite in comparison with the calculation result obtained from the usual space radiation models is reported.

Affiliated with

Also associated with

No associations

Rating

The space radiation environment in the low earth orbit measured by the Daichi satellite 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 The space radiation environment in the low earth orbit measured by the Daichi satellite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The space radiation environment in the low earth orbit measured by the Daichi satellite will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1881063