Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm22a0561i&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SM22A-0561
Physics
2423 Ionization Mechanisms, 2467 Plasma Temperature And Density, 2487 Wave Propagation (6934), 2494 Instruments And Techniques
Scientific paper
The radio wave propagation characteristic in the lower ionosphere is important because of its effect on commercial radio communication, navigation, and broadcast services. The electron density is of primary interest in this region because the high ion-neutral collision frequencies result in radio wave absorption. Previous studies have examined the electron density profile and structure of the ionosphere using the rocket and satellite measurements. The standard International Reference Ionosphere (IRI) model gives the estimated electron density profile based on the measurements, but no sufficient measurements have been accumulated below 65 km to estimate the model ionosphere to lower altitudes. In order to investigate the ionization structure in the altitude below 90 km by means of MF-band signals propagation, the Alaska rocket SRP-4 experiments has been carried out. The rocket was launched at 12:08 LT on March 18, 2002 at Poker Flat Research Range. The apex of rocket trajectory was about 89 km. We observed three different signals, CHENA (257 kHz), KFAR (660 kHz) and KCBF (820 kHz), transmitted from navigation and broadcast stations near Fairbanks, Alaska. Three signals were successfully observed from an altitude 0 km - 89 km during the ascent flight. The intensity of 257 kHz signal decreases steeply at an altitude higher than 65 km and reflects perfectly at about 75 km. The altitudes of perfect reflection of 660 kHz and 820 kHz signals are about 79 km and about 81 km, respectively. The approximate electron density profile can be determined from the comparison between these experimental results and propagation characteristics calculated by the full wave method. We will get the most probable electron density profile in the lowest ionosphere below 65 km.
Hawkins Gary J.
Ishisaka K.
Matsumoto Haru
Miyake Takashi
Murakami Satoshi
No associations
LandOfFree
Investigation of Electron Density Profile in the Lowest Ionosphere by SRP-4 rocket experiment does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Investigation of Electron Density Profile in the Lowest Ionosphere by SRP-4 rocket experiment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Investigation of Electron Density Profile in the Lowest Ionosphere by SRP-4 rocket experiment will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1438513