I. INSTRUMENTATION A. Vertical Sounding The IPS-42 Digital Ionosonde replaced the C-3 analog film-recording ionosonde. The sweep frequency is from one to 15 MHz. the ionosphere directly overhead is probed twice a day. B. Trans-Equatorial or Oblique Ionosonde Signals transmitted across the equator from MO and received in several southern stations reveal the changing characteristics [...]
Posts Tagged ‘spread-F’
15 Sep
Manila Observatory Ionosphere Division: Summary of Activities for 1994
I. Operate and Maintain the following instruments: IPS-42 Digital Vertical Ionosonde wth two Network Terminal Digitizer for recording ionograms on Data Cartridge Tape which could also be displayed and analysed on these terminals. Trans-Equatorial or Oblique Ionosonde or the Australian computer controlled Ionosonde. Total Electron Content & Scintillations Receiving and Recording Instruments To be installed [...]
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