Aeroluminescência da região equatorial: estudo via experimento do foguete

Mesospheric energy loss rates by OH and O<sub>2</sub> emissions at 23<sup>°</sup>S

“…Estimated errors in the absolute intensities for the two emissions are approximately AE15%. In order to calculate the radiation energy loss as a function of the height, the OH(8,3) and O 2 atmospheric (0,0) band volume emission pro®les observed at equatorial location (Melo, 1994;Takahashi et al, 1995) were used in the calculations. These simultaneous pro®les were obtained during an airglow rocket photometer campaign called MULTIFOT and are the only measured vertical pro®les in the Brazilian sector.…”

“…To obtain this, a weighting function was calculated from the volume emission pro®le observed by rocket photometer (Melo, 1994), as az szas where sz is the volume emission rate for 1 km interval in the vertical pro®le and s is the total column volume emission rate of the vertical pro®le. Notice that az is in step of 1 km and the ground intensity in photons s À1 cm À2 acolumnY so a conversion factor, b 10, is necessary to get photons s À1 m À3 units.…”

“…1) from the rocket measurements obtained at Alcaà ntara, Brazil, (Melo, 1994), we can estimate the fraction of the column emission rates between 84 and 93 km of altitude (see Table 3); where a 1 s h as [s h is the measured vertical pro®le of the OH(8,3) emission rate at a ®xed altitude and s is the OH(8, 3) band total column emission rate; see Table 3] and b 10. Also, using the neutral gas density from the MSIS-86 model and g p 1012X71 J/kg K, the equivalent energy loss rate during the night due to the OH airglow can be calculated as a function of altitude from the following equation…”

“…1) at equatorial latitude (Melo, 1994) we can estimate the fraction of the column emission rates between 92 to 101 km (see Table 3), where a 2 s h as [s h is the measured O 2 b0Y0 emission pro®le at ®xed altitude and s is the measured vertical O 2 b0Y 0 total column emission rate], b 10, g p 1013X77 J/kg K and qzY t is the neutral gas density used from the MSIS-86. Thus, the expression for the equivalent energy loss rate gives,…”