An interesting thread encompassing some broad subjects - here are 2 insights I can add -
1. I operate a couple of IP security type cameras that track meteors at night, they utilise similar s/w as the ANPR cameras but tuned for meteors, and these cameras are calibrated against a standard star catalog and worldwide multiple cameras are used to plot the expected trajectory of meteor fragments as was performed a while back for the one seen over Bristol with fragments located north at Winchcombe. One issue seen in the camera data was that the calibration drifted overnight, root cause is uncertain as to whether it is tectonic plate movement or thermal effects however it is quite significant -up to 3 arc seconds which approximates to about 1/3rd the diameter of the moon as typically seen in the UK. ...so what we see is in fact constantly moving!
2. In my more formative years I worked for a while at the Royal Post-Graduate Medical School assisting research into novel uses of dialysis e.g. treating smoke inhalation and similar. Part of my duties involved maintaining the machines being used in the main dialysis ward and one machine -a small portable one used for acute patients had an interesting background; it's development was funded by NASA who needed something to turn urine excreted by the astronauts into potable water since they'd calc'd they could not carry the payload of water required for some of the longer missions. So recycling water is nothing new!!
1. I operate a couple of IP security type cameras that track meteors at night, they utilise similar s/w as the ANPR cameras but tuned for meteors, and these cameras are calibrated against a standard star catalog and worldwide multiple cameras are used to plot the expected trajectory of meteor fragments as was performed a while back for the one seen over Bristol with fragments located north at Winchcombe. One issue seen in the camera data was that the calibration drifted overnight, root cause is uncertain as to whether it is tectonic plate movement or thermal effects however it is quite significant -up to 3 arc seconds which approximates to about 1/3rd the diameter of the moon as typically seen in the UK. ...so what we see is in fact constantly moving!
2. In my more formative years I worked for a while at the Royal Post-Graduate Medical School assisting research into novel uses of dialysis e.g. treating smoke inhalation and similar. Part of my duties involved maintaining the machines being used in the main dialysis ward and one machine -a small portable one used for acute patients had an interesting background; it's development was funded by NASA who needed something to turn urine excreted by the astronauts into potable water since they'd calc'd they could not carry the payload of water required for some of the longer missions. So recycling water is nothing new!!