The best viewing conditions are at middle latitudes near the summer solstice, when the mesospheric temperatures reach their lowest values and the twilight hours are at their longest.
Polar mesospheric clouds are thin layers of nanometer-sized ice particles that occur at altitudes between 82 and 87 kilometers in the high-latitude summer.
Oscillations of 2 to 3 days period are found in February and March in the mesospheric emissions.
Thermal profile information to an altitude of ~ 40 ~ km is recorded in the shape of the tropospheric line; mesospheric temperatures at ~ 60-80 ~ km are recorded by the Doppler width of the emission feature.
Given these evidences, we contend that there is a direct influence of ablating meteoroids on the topside of the mesospheric metal layer.
Definition of mesospheric in US English:
mesospheric
adjectiveˌmē-
See mesosphere
Example sentencesExamples
The best viewing conditions are at middle latitudes near the summer solstice, when the mesospheric temperatures reach their lowest values and the twilight hours are at their longest.
Given these evidences, we contend that there is a direct influence of ablating meteoroids on the topside of the mesospheric metal layer.
Oscillations of 2 to 3 days period are found in February and March in the mesospheric emissions.
Polar mesospheric clouds are thin layers of nanometer-sized ice particles that occur at altitudes between 82 and 87 kilometers in the high-latitude summer.
Thermal profile information to an altitude of ~ 40 ~ km is recorded in the shape of the tropospheric line; mesospheric temperatures at ~ 60-80 ~ km are recorded by the Doppler width of the emission feature.