SPRAY + AEROSOLE (METEOROLOGIE); REMOTE SENSING + FERNMESSUNG + FERNERKUNDUNG (GEODÄSIE); STRAHLUNGSBEOBACHTUNG (METEOROLOGIE); SONNENSCHEIN (METEOROLOGIE); TRÜBUNGSMESSUNGEN + SICHTMESSGERÄTE (METEOROLOGIE); PERIODISCHE METEOROLOGISCHE BEOBACHTUNGEN (METEOROLOGIE); SPRAY + AEROSOLS (METEOROLOGY); REMOTE SENSING (GEODESY); RADIATION OBSERVATIONS (METEOROLOGY); SUNSHINE (METEOROLOGY); TRANSMISSOMETERS + ATMOSPHERIC TRANSMISSION MEASUREMENTS + VISIBILITY MEASURING DEVICES (METEOROLOGY); PERIODICAL METEOROLOGICAL OBSERVATIONS (METEOROLOGY)