Geostationary Lightning Mapper On-Orbit Sources of False Events

Rafal, M ; Cholvibul, R ; Edgington, S ; Tillier, C ; Krimchansky, A ; Sullivan, P

关键词: GEOSYNCHRONOUS ORBITS;    GOES 16;    LIGHTNING;    CCD CAMERAS;    ONBOARD DATA PROCESSING;    ALGORITHMS;    ELECTROMAGNETIC NOISE;    LIGHT EMISSION;    RANDOM NOISE;    FALSE ALARMS;    NASA SPACE PROGRAMS;   

RP-ID  :  GSFC-E-DAA-TN60928

学科分类：自然科学（综合）

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

The first Geostationary Lightning Mapper (GLM) was launched aboard the GOES-R Spacecraft (now GOES-East) on November 19, 2016 and is now fully operational. GLM uses a high-speed camera and onboard video processing to detect the optical emission of lightning for the full disk observed from the geostationary orbit. During the Post Launch Test period the instrument and ground processing algorithms (GPAs) were tuned to optimize the tradeoff between detection efficiency and false event rate. False events, those not due to lightning, arise from a variety of sources. A primary function of the GPAs is to remove false events prior to assembling events into groups and flashes for use by weather forecasters and scientists. Effective discrimination of false events depends on understanding the phenomenology of the various sources of false events.