ISS Tracker App This app uses data provided by NASA to track the progress of the International Space Station in its voyage above the Earth. With this app, you can access information on where the ISS was passing over at specific moments, as well as information on sightings of the ISS from...
The “star tracker” that Pettit refers to is a device that he co-designed and built to capture long-exposure, blur-free photographs of stars. The device works by rotating the camera at the same rate as the station’s orbit — once every 90 minutes — compensating for the station’s mot...
Keen to improve his images, Pettit also created what became known as the “barn door tracker.” The DIY astrophotography tool allows for the capture of sharper images of city lights at night as the device compensates for the station’s movement relative to the Earth’s surface. It...
Fx = xb − f U W = 0 Fy = yb − f V W =0 (6) The first step of the AOCS absolute calibration is to perform the boresight calibration between the star tracker and the other payloads using GCPs (ground control points) located at calibration sites. To this end, the boresight ...
free by inserting control variables into the mouse queue Figure 13: CAMSHIFT-based face tracker used to "fly" over a 3D graphic's model of Hawaii CAMSHIFT Analysis Comparison to Polhemus In order to assess the tracking accuracy of CAMSHIFT, we compared its accuracy against a Polhemus tracker...