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Observing polar regions from space: comparison between highly elliptical orbit and medium earth orbit constellations;
Trishchenko, A P; Garand, L; Trichtchenko, L D. Journal of Atmospheric and Oceanic Technology vol. 36, 2019 p. 1605-1621,
https://doi.org/10.1175/JTECH-D-19-0030.1 
Open Access
(NRCan Cont.# 20190018)