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Proposal Identification No.: T1998 Date Received: 2004­May­31 16:13:34
Technical Page
Proposal Type: Regular
General Category: Terrestrial Aeronomy
Sub­Category: Radar
Observation Category: Ionosphere
Total Time Requested: 72 Hours
Proposal Title: Study of the ranges of meteoroid masses detectable by UHF and VHF HPLA
radar and their implications for the total meteoric mass flux into the Earth atmosphere
ABSTRACT:
The total meteoric mass flux into the Earth atmosphere is an important quantity for numerous aeronomic
processes, e.g. the formation of the mesosphere metal layers, noctilucent clouds, sporadic E layers, and the
nighttime ionization in the E­region. This quantity is, however, di#cult to measure because of the huge range of
meteoroid masses which contribute to the total mass flux. Mathews et al. (2001) used observations of only the AO
UHF radar to derive a global total mass flux, which comes out somewhat lower than previous evaluations and it
certainly needs further verifications or a re­interpretation. As a contribution towards this task, we propose to
quantify the mass range of observable meteoroids in both the UHF and VHF frequency range of the AO radar
system. To achieve the proposed, and some additional, goals we require to perform the observations during the
upcoming Orionids meteor shower which would provide us also a prominent component of fast meteoroids.
Name Institution E­mail Phone Student
Diego Janches CIRES/University of
Colorado
diego.janches@colorado.edu 303­492­5847 no
Service Observing Request Remot e Observing Request
X None X No
All of the observing run. Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
47 CH receiver 47 radar 430 CH receiver 430 CH radar
Atmospheric Observation Instruments:
Lidar
Special Equipment or setup: none
1

RFI Considerations
Frequency Ranges Planned
2