Hercules A

Hercules A
Radio-Optical View of the Galaxy Hercules A - Many thanks to: NASA, ESA, S. Baum and C. O'Dea (RIT), R. Perley and W. Cotton (NRAO/AUI/NSF), and the Hubble Heritage Team (STScI/AURA)

Tuesday, April 9, 2013

130308 Io-B - ionospheric electron concentration change rate from Mount 2013 04 09 publication

I analyze Mount's published spectrum and measure:

Drift rate ~  -1.4E-3 MHz/s at 21 MHz on 130308 0130 UTC
Relative drift rate = -6.7E-5 per second

Relative ionospheric electron concentration change rate ~ -1.3E-4 per  second ~ - 0.78 % per minute

More about ionospheric modulations at:

Many thanks to Andy for his publication.