Increase in hydrogen emission of upper atmosphere following launches of space vehicles

Details Increase in hydrogen emission of upper atmosphere following launches of space vehicles Increase in hydrogen emission of upper atmosphere following launches of space vehicles

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985rpspr.......48m&link_type=abstract

In its USSR Rept.: Space (JPRS-USP-85-001) p 48 (SEE N85-22403 13-12) Transl. into ENGLISH from Kosmicheskiye Issled. (USSR),

Astronomy and Astrophysics

Astrophysics

Emission, H Alpha Line, Hydrogen, Nightglow, Spacecraft Launching, Upper Atmosphere, Annual Variations, Atmospheric Composition, Launch Dates, Summer, Winter

Scientific paper

An increase in the amount of hydrogen in the upper atmosphere is attested by a slight enhancement of the normalized hydrogen-alpha emission intensity observed an average of 2 to 6 days after spacecraft launches. These observations of the 656.3 nm emission line in the nighttime sky spectrum were made at the Abastumani Astrophysical Observatory of the Georgian Academy of Sciences between 1968 and 1978. The analysis is applied only to spacecraft with an apogee above 800 km, starting with the INTELSAT-3C (F-3) in 1969 and concluding with the Navstar-2, DSCS-13 and DSCS-14 in 1979. The deviations in the alpha line intensity from the average season values is plotted as a function of time in terms of days before and after the launch date. There is an increase in the excess hydrogen line emission intensity in the winter, some 3 to 6 days after a launch with a maximum upward deviation 4 to 5 days following the launch. The effect is not observed in the summer.

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