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The Incoherent Scatter Spectrum
Digital Chirp Generator
9 other sections not shown
altitude Arecibo Arecibo Observatory bandwidth broadening buffer change of plasma chirp coefficient CHIRP LENGTH chirp period chirp rate clock cycles clock dividing Cmax compute dechirped determine digital chirp downshifted plasma line edge frequency electron density electron temperature Equation F-region peak frequency accumulator frequency offset frequency variation frequency versus height frequency with height gate delay Hagfors heated region heater HF-enhanced plasma line incoherent scatter input INTEGER integration period ionosphere kHz/km Langmuir frequency profile Langmuir frequency versus Langmuir waves line frequency gradient line frequency versus linear change Load pulse magnetic field matching height measured model spectrum natural plasma line observed output parabolic parameters Parity plasma frequency plasma line frequency plasma line intensity plasma line spectrum plasma oscillations power spectrum quadratic chirp quadratic coefficient radar range gate received spectrum resolution samples sets of spectra shown in Figure SUBROUTINE transmitter frequency Up/Down upshifted plasma line versus height profile width