- distinguish artificial and natural satellites
And he shall cause the house to be scraped within round about, and they shall pour out the dust that they scrape off without the city into an unclean place:
Leviticus 14:41 KJV
- How to avoid a BSOD on your 2 billion dollar spacecraft (clarkwakeland.com)
The lifecycle of most spacecraft consists of a final phase where all the systems are tested to various levels of synergy. One of the most important and complex set of tests are the Closed Loop Tests (CLTs), where the spacecraft is sent simulated orbital data, and then its attitude response is observed.