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China microsat approaches the ISS
Sept. 27, 2008 - The astronauts on board China's third manned space mission deployed a microsat (BX-1) from their Shenzhou VII spacecraft. After release, the BX-1 came within 23km of the International Space Station (ISS).
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Chinese ASAT All Objects
Shows the overall status of the entire space catalog. Shown here, the entire catalog as of February 2007 is depicted in three sets of objects: blue - on-orbit active payloads, orange - on-orbit space debris, and red - debris from Chinese ASAT test.
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Geobelt Coverage
This VDF is an example of how STK can be used to
model sensor coverage at varying altitudes, including
thousands of miles above the Earth at the GEO Belt,
where Geostationary satellites typically reside. The
coverage grid is a 10 band. There are four Sun
Synchronous Critically Inclined satellites and three
Remote Sensing satellites whose mission is to constantly observe the GEO Belt. Their wide rectangular sensors allow them to scan large swaths of the belt. Coverage accumulates over the 24 hr period and is designated by the colors defined by the coverage legend.
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New Foreign Launch
Shows the path of polar-orbiting object and/or debris. As this passes across CONUS, it is picked up by SSN sensors. During times where SSN access occurs, the sensor field of view projections turn on, highlighting the time period where observations are collected
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Prox Ops Sensor Noise
Shows a microsat performing an inspection mission about a Centaur upper stage. It is flying a user-specified path about the upper stage (green path). At a certain time, sensor noise is simulated to analyze the impact to the proximity operations mission. In this case, the microsat starts to diverge from the nominal path and drifts away (red path), until the sensor noise problem clears up and the closed-loop operations continue, and the original path is reacquired (yellow path).
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Satellite Tracking
Depicts the situation where ground-baded and space-based observations of an unknown object are combined in one orbit estimation process. Initially, the space-based observations are downlinked to a tracking station, and then once that information is processed, the tracking station begins to perform ground-based tracking of the unknown object. The observations from both sources are combined to produce a high-fidelity orbit estimate.
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SBSS
This scenario demonstrates how STK can be applied to Space Control initiatives such as Space-Based Space Surveillance (SBSS). In the scenario four SBSS satellites in a MEO constellation perform reconnaissance on four GEO satellites.
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