We present preliminary observational results of short-period variations in the night sky airglow at middle latitudes. Observations were performed by using a CCD-based photometer over 2016 December to 2017 March. The main objective of our study is to determine a possibility of using a CCD camera to record fast optical flashes, and check a capability to separate signals from satellites, meteors, ground lightning discharges, etc. We describe automatic algorithms to select a frame with a flash and to identify the flash type. Based on the primary database of flashes, a preliminary statistical analysis of the results of observations was performed.
The Irkutsk Incoherent Scatter Radar (IISR) has a frequency band of 154–162 MHz and a polarization filter which allows measurements of electron density profiles using fadings in a received signal that arise due to the Faraday rotation of radio waves in the ionosphere. In addition, profiles of electron and ion temperatures can be obtained by examination of a signal autocorrelation function. There is a radar equation that links those plasma parameters with the power of the received incoherent scatter signal. This paper dedicated to the receiver channel calibration that is necessary for absolute measurements of the power. Absolute measurements provide us with an additional method of data processing and may reveal signal sources that have a coherent nature. We apply the calibration method based on sky noise maps, where we use the simulated antenna temperature as a source of known signal.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.