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Proposal Identification No.: T2402 Date Received: 2008­Feb­07 18:52:12
Technical Page
Proposal Type: Long­term
General Category: Terrestrial Aeronomy
Sub­Category: Radar
Observation Category: Thermosphere
Total Time Requested: 960 Hours
Minimum Useful Time: 3 hours
Proposal Title: Toward the development of a new [O] estimation technique using the twilight
airglow OI 8446 š A emission
ABSTRACT:
Although atomic oxygen density, [O], is a key state parameter of the upper atmosphere, its empirical estimation is
notoriously di#cult. At mid­latitudes, OI 844.6 nm emission brightness is a potentially excellent proxy for [O], and
recent improvements to its forward emission model warrant renewed e#ort to pursue ground­based sensing using
this unique emission. This proposal represents a first step toward the development of this long­overdue capability.
The scientific goals are two­fold: (1) to reduce the uncertainty in a key parameter -- neutral meridional wind speed
-- of the forward model of 844.6 nm emission generation and (2) to assess the conditions for which the existing
forward model is justified in its neglect of a key alternative source of 844.6 nm production -- radiative
recombination of O+. To this end, we propose several observational campaigns, spanning a variety of seasonal
conditions, using combined passive optical and incoherent scatter radar instrumentation.
Name Institution E­mail Phone Student
Lara S Waldrop University of Illi­
nois at Urbana­
Champaign
lwaldrop@uiuc.edu 217­244­5129 no
Remote Observing Request
X Observer will travel to AO
Remote Observing
In Absentia (instructions to oper­
ator)
Instrument Setup
430 G 430 CH receiver 430 CH radar
Atmospheric Observation Instruments:
Tilt­Photometer Fabry­Perot
1

Special Equipment or setup: none
RFI Considerations
Frequency Ranges Planned
2