সরাসরি ভিডিও কলে পরামর্শ নিন Bissoy অ্যাপ এ

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A light level geolocator, light-level logger or GLS is essentially a lightweight, electronic archival tracking device, usually used in bird migration research to map migration routes, identify important staging areas, and sometimes provide additional ecological information. A geolocator periodically records ambient light level to determine location.

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