QUYÊN. CASE STUDY OF RAIN PARAMETERS IN HANOI BY THE DROP SIZE MEASUREMENT EQUIPMENT THAT BASED ON OPTICAL PRINCIPLE. Journal of Military Science and Technology, [S. l.], n. 70, p. 45–53, 2020. DOI: 10.54939/1859-1043.j.mst.70.2020.45-53. Disponível em: https://jmst.mod.gov.vn/index.php/jmst/article/view/110. Acesso em: 12 mar. 2026.