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The CALorimetric Electron Telescope (CALET) is a high-energy astroparticlephysics space experiment installed on the International Space Station (ISS),developed and operated by Japan in collaboration with Italy and the UnitedStates. The CALET mission goals include the investigation of possible nearbysources of high-energy electrons, of the details of galactic particleacceleration and propagation, and of potential signatures of dark matter. CALETmeasures the cosmic-ray electron + positron flux up to 20 TeV, gamma-rays up to10 TeV, and nuclei with Z=1 to 40 up to 1,000 TeV for the more abundantelements during a long-term observation aboard the ISS. Starting scienceoperation in mid-October 2015, CALET performed continuous observation withoutmajor interruption with close to 20 million triggered events over 10 GeV permonth. Based on the data taken during the first two-years, we present anoverview of CALET observations: uses w/o major interruption 1) Electron +positron energy spectrum, 2) Nuclei analysis, 3) Gamma-ray observationincluding a characterization of on-orbit performance. Results of theelectromagnetic counterpart search for LIGO/Virgo gravitational wave events arediscussed as well.

The CALorimetric Electron Telescope (CALET) on the International Space Station: Results from the First Two Years On Orbit