The use of continuous electric propulsion to manipulate a
satellite's orbit offers significant potential for enhancing
coverage of a target in ways not previously considered. Elliptical
orbits utilizing a very low perigee can facilitate access to the
surface and atmosphere of the Earth at sub-ionosphere altitudes
while counteracting atmospheric drag forces using continuous
electric propulsion. Additionally, in-plane and out-of-plane
manipulation of both circular and elliptical orbits can allow for
passage of a satellite over a target at a given time. Sustained low
perigee orbit was modeled with an initial perigee altitude of 100
km and various apogee altitudes to derive a range of apogee
altitudes that could sustain the orbit. Operation was demonstrated
for current as well as future thruster capabilities. To evaluate
opportunities for a scheduled access, circular and various
elliptical orbits were modeled using continuous thrust. It was
found that electric propulsion was capable of improving potential
temporal access of a target to 30% for circular orbits and nearly
70% for elliptical orbits Recommendations include further modeling
of low perigee orbits and the effects of atmospheric variation at
solar extremes on mission lifetime. Derivation of optimal thrust
duration and angle could greatly enhance the performance of the
thruster and warrants continued research. Finally, the use of
responsive maneuver operationally will require development of a
scheduling algorithm to plan passage over a given target at a given
time.
General
| Imprint: |
Biblioscholar
|
| Country of origin: |
United States |
| Release date: |
November 2012 |
| First published: |
November 2012 |
| Authors: |
Timothy S. Hall
|
| Dimensions: |
246 x 189 x 5mm (L x W x T) |
| Format: |
Paperback - Trade
|
| Pages: |
102 |
| ISBN-13: |
978-1-288-30604-6 |
| Categories: |
Books >
Social sciences >
Education >
General
Promotions
|
| LSN: |
1-288-30604-0 |
| Barcode: |
9781288306046 |
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