Comparative study of the equatorial ionosphere with Impedance probe and Langmuir probe instruments in the DEOS campaign

Details Comparative study of the equatorial ionosphere with Impedance probe and Langmuir probe instruments in the DEOS campaign Comparative study of the equatorial ionosphere with Impedance probe and Langmuir probe instruments in the DEOS campaign

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.471..363h&link_type=abstract

In: 15th ESA Symposium on European Rocket and Balloon Programmes and Related Research, 28 - 31 May 2001, Biarritz, France. Ed.:

Computer Science

Sound

Earth Ionosphere, Spread-F, Langmuir Probe, Impedance Probe

Scientific paper

In the DEOS project three sounding rockets (F05-F07) were launched from SHAR, South India into the equatorial ionosphere in April and September 1998. In order to study the dynamics of the E-and F-region at the edge of the equatorial electrojet, and make in-situ measurements in a ionosphere perturbed by equatorial Spread-F, each payload was equipped with an Impedance probe (IP), two Langmuir probes in fluctuation (LP2) and swept mode (LP1), a resonance cone instrument (RC) and a radio beacon experiment (RABER). This payload allowed to make absolute measurements of the electron temperature Te, the electron density ne, density fluctuations δne/ne and the total electron content TEC at altitudes up to 430 km. On the upleg of flight F06, density depletions below the F-maximum were observed by the IP and LP instruments, whereas on the downleg a smooth density profile was encountered. Density profiles from both instruments are compared in perturbed and unperturbed conditions and show a close agreement. Profiles from flights F05 and F07 are also presented. The in-situ electron density profiles are compared with ground based measurements. Profiles of the absolute electron temperature measured by the LP1 during flight F06 show a reduced electron temperature inside the density depletions.

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