"0169-3298" . "69;99" . "In the lower part of the ionosphere below about 90 km, the rocket measurements of electron density, the indirect phase reflection height measurements and the A3 radio wave absorption measurements reveal trends corresponding to cooling and shrinking of the mesosphere. The radio wave absorption and rocket electron density measurements clearly display a substantial dependence of trends on height. Ionosonde data show that there is a model-expected trend in the maximum electron concentration of the E region ionosphere; foE is slightly increasing, the height of the normal E layer, h`E, is slightly decreasing. The nighttime LF radio wave reflection height measurements near 95 km support an idea of increasing electron density. However, rather scarce rocket measurements display a negative trend in electron density at 90-120km."@en . "31"^^ . . "La\u0161tovi\u010Dka, Jan" . . "Bremer, J." . "D region; E region; long-term trends"@en . . "An overview of long-term trends in the lower ionosphere below 120 km." . . "25" . "An overview of long-term trends in the lower ionosphere below 120 km."@en . . . "N/A" . . "Surveys in Geophysics" . "RIV/68378289:_____/04:04040005" . "[83662AF9B064]" . . "1"^^ . "554127" . . . . . "NL - Nizozemsko" . "An overview of long-term trends in the lower ionosphere below 120 km."@en . . "P(IAA3042101), Z(AV0Z3042911)" . "0"^^ . . "0"^^ . "2"^^ . "An overview of long-term trends in the lower ionosphere below 120 km." . "In the lower part of the ionosphere below about 90 km, the rocket measurements of electron density, the indirect phase reflection height measurements and the A3 radio wave absorption measurements reveal trends corresponding to cooling and shrinking of the mesosphere. The radio wave absorption and rocket electron density measurements clearly display a substantial dependence of trends on height. Ionosonde data show that there is a model-expected trend in the maximum electron concentration of the E region ionosphere; foE is slightly increasing, the height of the normal E layer, h`E, is slightly decreasing. The nighttime LF radio wave reflection height measurements near 95 km support an idea of increasing electron density. However, rather scarce rocket measurements display a negative trend in electron density at 90-120km." . . . "RIV/68378289:_____/04:04040005!RIV/2004/AV0/A04004/N" . .