Constellation Design Examples (page 1)
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The
first two examples were generated with
the "Continuous Coverage Constellation Design - Circular Orbits"
module. The design requirement was to provide continuous coverage
within -70 ..+70o latitude at a minimum ground elevation angle of 20o.
Circular orbits with an altitude of 1400 km have been considered in
both cases.
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Click on highlighted links below to see reports
produced by the Coverage Analysis and
Constraints Analysis modules.
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The Coverage Analysis
report shows the minimum number of satellites available at all times to each
point of the latitude bound at a given elevation
angle (20o).
The "P" value in the N field identifies
the latitude bound of periodic coverage,
"N" - latitude bound, all points of
which are never covered by the constellation.
The Constraints Analysis report shows the minimum ground elevation angle, which
has to be maintained by the generated constellation to provide
continuous coverage at specified latitudes.
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Example 1.1.
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Constellation Parameters
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Values
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Continuous Coverage Area
at a Minimum Elevation Angle
of 20o
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-70.75o..
+70.75o
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Number of Satellites |
71 |
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Orbit Inclination (deg) |
121.9
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Altitude of Perigee (km) |
1400.0
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Altitude of Apogee (km) |
1400.0
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Number of Planes |
71
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Number of Satellites per Plane |
1
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| RAAN
Increment (deg) |
360.0/71
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| Phase
Increment (deg) |
278.873 |
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Example 1.2.
| Constellation
Parameters |
Values
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| Continuous Coverage Area
at a Minimum Elevation Angle
of 20o |
-90.0o..
+90.0o
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Number of Satellites |
70 |
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Orbit Inclination (deg) |
88.0
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Altitude of Perigee (km) |
1400.0
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Altitude of Apogee (km) |
1400.0
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Number of Planes |
7
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Number of Satellites per Plane |
10
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| RAAN
Increment (deg) |
27.458 |
| Phase
Increment (deg) |
17.011 |
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Page 4
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