NASA Technical Reports Server (NTRS) 19930019535: NEP Space Test Program Objective

37 Pages·45.3 MB·English

by  NASA Technical Reports Server (NTRS)

NEP 5Dace Test Program Objective
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The Objective Of The NEP Space Tes
To Launch A NEP S .. ...
To
Septembet 15.1992
NEPSp.oe
Space Technology Research Vehicle.
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1 Pial,
- Experiments
•
of recent advances in the PV area
-.
. ul "industry su If
-- Increase cooperation SA LeRC ORA
- Power Panels
----tl
-- Useful "sDace hardware" exp .
nt
s solar cell technology
CH cells in a hostile environment ... __
•
outslae co
- ---41 - Ground testin
-- ConTI of space data and other ground testing
-- Partici US-ESA calibration effo
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THERMISTORS (3)
•
IMPORTANCE OF COMBINING SKIRT WITH EISG (con't)
• SKIRT will allow EISG to measure other contributors to
the infrared glow: OH, NO+, •• _" •..
• SKIRT will obtain data during both day and night sides '.
of orbits, thereby enhancina EISG niaht-o •••
~~~
1r .....
• Comparing SKIRT data from STS-39 and STS-62 will
show the dependence of the glow on· ·
activity cycle.
• EISG/SKIRT will expand and enhance the technolog
base Dertainina to shuttle glo ••.
'-,
IMPORTANCE OF COMBINING SKIRT WITH EISG
• Only by including SKIRT as part of EISG will it be
possible to investigate all aspects of the alow Drocess.
SKIRT aives IR spectroscopic cove
• The elliptical orbits planned for STS-62 will provide
unique opportunity to measure the IR, visi_._,
glow as a function of altitude. Altitude informatio
was not obtained by S
• EISG nitrogen gas releases will Drovide the first
combined IR, vis·
plays in the alow chemis ••
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......
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THE ROLE OF INFRARED SPECTRA
IN INVESTIGATING THE GLOW PROCESS
• Spacecraft-atmospheric interaction involves three
reac s .
1) 2 + 0 -> NO + N
2) Osurfac- ..... . -
3)
Nsurface + N -> N2*
• Reaction 1) is monitored by observing NO spectral
emisslo • s s
ed
by S
• Reactions 2) and 3) are monitored by observing N02*
and N 2* spectral emissions in the vis·
ultraviolet. resDecti. _ •••
• Only by observing spectra in all three regimes -IR
visible, and UV • can t
studie"".
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Figure 36. 2.9 pm, 4.5pm, and 5.5 pm Glow Intensities VB Ram Angle.2S
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