A STUDY OF THE IONOSPHERIC ELECTRON MEASUREMENT ON THE MEDIUM-SIZED SCIENTIFIC ROCKET , KSR-II

중형과학로켓, KSR-II를 이용한 이온층 전자 밀도 및 온도 분포 측정에 관한 연구

  • Lee, Jae-Jin (Department of Physics, KAIST) ;
  • Kim, Jhoon (Space Division, Korea Aerospace Research Institute) ;
  • Lee, Soo-Jin (Space Division, Korea Aerospace Research Institute) ;
  • Min, Kyoung-Wook (Department of Physics, KAIST) ;
  • Pyo, You-Surn (Radio Research Laboratory) ;
  • Cho, Gwang-Rae (Space Division, Korea Aerospace Research Institute) ;
  • Rhee, Hwang-Jae (Radio Research Laboratory)
  • 이재진 (한국과학기술원 물리학과) ;
  • 김준 (한국항공우주연구소) ;
  • 이수진 (한국항공우주연구소) ;
  • 민경욱 (한국과학기술원 물리학과) ;
  • 표유선 (전파연구소) ;
  • 조광래 (한국항공우주연구소) ;
  • 이황재 (전파연구소)
  • Published : 1998.12.01

Abstract

This paper reports the results obtained from the Langmuir probe (LP) and Electron Temperature Probe (ETP) experiments on the sounding rocket KSR-II (Korean Scientific Rocket - II) which was launched on Jun 11, 1998 at 10:00 KST from Tae-An peninsula (37$^{\circ}$ N, 126$^{\circ}$ E). The instruments successfully measured the electron density, electron temperature, and the floating potential at altitudes of 73km to 130km. While the electron temperature measurement is not easy in this region, since the temperature is very low and the contamination effect of the probe may give rise to a problem, we were able to obtain a reasonable electron temperature profile by employing two independent methods, the pulse modulated Langmuir Probe and Electron Temperature Probe. The preliminary results show that electron density increases sharply at about 90km, and forms a peak at 102km. The density profile is roughly consistent with IRI (International Reference Ionosphere)95-model or PIM (Parameterized Ionospheric Model) results except that the peak density appears at 110km in the model and model electron density is slightly lower than the observed one. Electron temperature obtained from ETP fluctuates between 200$^{\circ}$K and 700$^{\circ}$K, an effect presumably coming from the wakes developed by LP, and it tends to increase with the altitude, which is consistent with the LP results.

Keywords

References

  1. 한국우주과학회지 v.12 no.2 표유선;민경욱;최영완;이동훈;강광모;황순모;김병철;김준;이수진
  2. Ph.D. Thesis, the University of Michigan Kim, J.
  3. JGR v.70 Spencer, N. W.;Brace, L. H.;Carignan, G. R.;Taeusch, D. R.;Niemann, H.
  4. JGR v.92 Hedin, A. E.
  5. Geophys. Res. Lett. v.25 Shoichiro, F.;Yamamoto, M.;Tsumoda, R. T.;Hayakawa, H.;Mukai, T.
  6. J. Geomag. Geoelctr. v.22 Hirao, K.;Oyama, K.
  7. Rev. Sci. Instrum. v.46 Holmes, J. C.;Szuszczewicz, E. P.
  8. JGR v.75 Nagy, A. F.;Banks, P. M.
  9. Phys. Rev. v.76 Reifman, A. F.;Dow, W. G.
  10. JGR v.67 Evans, J. V.
  11. Geomag. Geoelctr. v.24 Hirao, K.;Oyama, K.
  12. J. Appl. Phys. v.46 Szuszczewicz, E. P.;Holmes, J. C.
  13. J. Geophys. Res. v.90 Torr, M. R.;Torr, D. G.
  14. Report of ISAS(525) Oyama, K. I.
  15. Planet. Space Sci. v.24 Oyama, K. I.