Daytime midlatitude plasma depletions observed by Swarm: Topside signatures of the rocket exhaust
Abstract
The daytime midlatitude plasma depletions (DMLPDs) observed on 22 May 2014 and 20 May 2015 by the Swarm constellation are not explained by any known natural phenomena. The DMLPDs were detected after rocket launches, and the DMLPD traces converged to the launch station. The event in 2015, for which sufficient total electron content (TEC) data are available, is accompanied with TEC depletion lasting for about 6 h. The persistence generally agrees with the lifetime expected for rocket exhaust depletions (REDs) which is determined by the recombination of the ionospheric oxygen ion with water molecules in the rocket exhaust. These results lead to the conclusion that DMLPDs are REDs in the topside. The RED characteristics identified from the observations on both days are (1) enhancement in electron temperature, (2) reduction in electron pressure, and (3) absence of substructures down to scale sizes of about 8 km (Nyquist's scale size).
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 04, 2016
- Source ID
- 10.1002/2016gl067810
Entities
People
- Anthea J. Coster
- Claudia Stolle
- H. Lühr
- Hyosub Kil
- Jaeheung Park
- William R. Coley
- Young‐sil Kwak
Organizations
- Air Force Research Laboratory
- Johns Hopkins University
- Korea Astronomy and Space Science Institute
- Korea University of Science and Technology
- Massachusetts Institute of Technology
- University of Texas at Dallas