The First GECAM Observation Results on Terrestrial Gamma‐Ray Flashes and Terrestrial Electron Beams

Abstract Gravitational‐wave high‐energy Electromagnetic Counterpart All‐sky Monitor (GECAM) is a space‐borne instrument dedicated to monitoring transients, including Terrestrial Gamma‐ray Flashes (TGFs) and Electron Beams (TEBs). We implemented TGF/TEB search algorithm for GECAM, with which 147 bright TGFs, 2 typical TEBs special TEB‐like events are identified during an effective observation time of ∼9 months. show that, gamma‐ray charged particle detectors, GECAM can effectively identify distinguish TGFs TEBs, measure their temporal spectral properties in detail. A very high TGF‐lightning association rate ∼80% obtained between GLD360 east Asia region.