From Event: SPIE Optical Engineering + Applications, 2019
The second generation Tiny Ionospheric Photometer (TIP) is a compact, high-sensitivity, nighttime ionospheric photometer designed for small satellites. TIP launched February 19, 2017 to the International Space Station as part of the GPS Radio Occultation and Ultraviolet Photometry—Colocated (GROUP-C) experiment to test advanced sensing objectives. The TIP optical design improves upon previously-flown photometers and employs a filter wheel to measure signals. The third generation sensor is a 1U Cubesat-compatible Triple Tiny Ionospheric Photometer (Tri-TIP), manifested to fly on the dual 6U Coordinated Ionospheric Reconstruction CubeSat Experiment (CIRCE) in early 2020. The Tri-TIP design builds upon several technologies demonstrated aboard TIP, but utilizes a beam splitter to simultaneously monitor signal, red-leak, and background signals. This paper compares the pre-flight and on-orbit performance of TIP with pre-test theoretical results for Tri-TIP.
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Scott Budzien, Bruce Fritz, Andrew Stephan, Peter Marquis, Steven Powell, Brady O'Hanlon, Andrew Nicholas, Kenneth Dymond, and Charles Brown, "Comparison of second and third generation 135.6 nm ionospheric photometers using on-orbit and laboratory results," Proc. SPIE 11131, CubeSats and SmallSats for Remote Sensing III, 1113102 (Presented at SPIE Optical Engineering + Applications: August 11, 2019; Published: 6 September 2019); https://doi.org/10.1117/12.2528791.
