Objectives and Applications
The ePOP probe observes the Earth’s ionosphere, where space meets the upper atmosphere. The instruments are used in conjunction with other satellite-based and ground-based instruments to analyze radio wave propagation in the ionosphere, measure the densities of ionized particles, and observe the aurora from space, all as they respond to space weather. The orbit is 450 km to 1250 km. Note: MDA is the owner and University of Calgary is the operator. Since December 2021, spacecraft is in slow rotation due to 3 damaged reaction wheels, but continues to collect science data.
Full Name
Enhanced Polar Outflow Probe on the CAScade, Smallsat and IOnospheric Polar Explorer
aka CASSIOPE
Mission Status
Operational (extended)
Mission Agencies
ESA
, MDA
, University of Calgary
Launch Date
29 Sep 2013
Mission Links
EOL Date
Dec 2025
Orbit Type
Inclined, non-sun-synchronous
Orbit Period
101 minutes
Orbit Sense
N/A
Orbit Inclination
81 deg
Orbit Altitude
450 km
Orbit Longitude
NORAD Catalog #
International Designator
CER - Coherent Electromagnetic Radio Tomography |
| FAI - Fast Auroral Imager |
| GAP - GPS receiver-based Attitude, Position, and profiling experiment (GAP) |
| IRM - Imaging and Rapid-scanning ion Mass spectrometer |
| MGF - MaGnetic Field instrument |
| NMS - Neutral Mass Spectrometer |
| RRI - Radio Receiver Instrument |
| SEI - Suprathermal Electron Imager |
| Category | Parameter | Instrument(s) |
| Gravity and Magnetic Fields | Gravity, Magnetic and Geodynamic measurements | CER, FAI, GAP, IRM, MGF, NMS, RRI, SEI |
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