Quarterly progress rept. no. 12, 1 Jul-30 Sep 66,
ILLINOIS UNIV URBANA ELECTRICAL ENGINEERING RESEARCH LAB
Pagination or Media Count:
Moon-reflected signals were received on 34 days for approximately 301 hours at 150.6 mc and on 33 days for approximately 61 hours at 413.25 mc. There was solar activity on several observation days, but the data have not been correlated with any natural phenomena. Gains of a right-hand circularly polarized antenna, left-hand circularly polarized antenna, and a dipole in a corner reflector are given as 11.7 db, 8.7 db, and 8.9 db, respectively. Moon reflected signals using the dipole in a corner reflector antenna were good, with a maximum signal to null ratio of 8 db, indicating that a relatively simple receiving station can be used to receive moon reflected signals. Most of the data have been processed through August 1966. The data for 1965 are being prepared for Volume IV of the Atlas of Lunar Data. Volumes I, II and III of the Atlas have been completed. The station can now be operated automatically in the sense that the antenna can follow the moon automatically and keep the 150.6 mc signal tuned in automatically. Silicon controlled rectifiers are used to replace three magnetic amplifiers in the azimuth control circuits. A clock controlled set of switches are used to turn the equipment on and off at the proper times. The topside to bottomside ionospheric electron content ratio is being studied for the October 1965 data.
- Atmospheric Physics