ABSTRACT
IGW inner gravity wave IS incoherent scattering ISR incoherent scatter radar IW ionic whistler LET local east time LF low frequency LHC left-hand circular LHF low-hybrid frequency LHR low-hybrid resonance MF median frequency MGD magnetic-gradient wave MHD magnetohydrodynamic (waves) MLat magnetic latitude MLT magnetic local time MUF maximum useful (usage) frequency OME orbit maneuver engine OMS orbit maneuver system OR ordinary (wave) or.f ordinary fast (wave) or.s ordinary slow (wave) OS orbit satellite PLF polarization loss factor RHC right-hand circular (polarization meaning) RL rocket launch RPO radiophysical observatory RTI Rayleigh-Taylor instability SAW shock-acoustic wave SDF spectral density function SMHD slow magnetohydromagnetic (wave) SNR signal-to-noise ratio SS Space Shuttle ST solar terminator SV space vehicle TEC total electronic content UHF ultra-high frequency UHR upper hybrid resonance ULF ultra-low frequency UT universal time VGW vertical gravity wave VHF very-high frequency VLF very-low frequency
VS vertical sounding VTEC vertical total electronic content WD wave disturbance WFT windowed Fourier transform WT wavelet transform
