Observing the Solar Wind with Interplanetary Scintillation

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Interference Issues ● ● Rise of mobile phones has encroached on the traditional observing band of EISCAT. Space around 930MHz now very limited, especially at Sodankylä.
Median Sampling ● ● Data usually sampled initially at a very high rate and then averaged down to a sampling rate of 100Hz later. ● ● ● Historically, the averaging was done in a separate 'IPS card' Now done by the channel board filters. Averaging performed using a standard mean. Averaging using the median is less susceptible to interference spikes (if there are not too many...). ● ● Can do this at EISCAT, but only by recording data at the full rate and averaging in software later! Sometimes results in data drops because of the rate...
Page 1 and 2: Observing the Solar Wind with Inter
Page 3 and 4: Radio Measurements Line of sight to
Page 5 and 6: Cross-Correlation Cross-correlation
Page 7 and 8: Longer Baselines If longer baseline
Page 9 and 10: Tomography ● Many observations ta
Page 11 and 12: Tomography Co-rotating analysis Com
Page 13 and 14: Why EISCAT? ● ● ● ● Observi
Page 15 and 16: Radio Source Tracking ● ● ●
Page 17: Filter Settings Power Central Filte
Page 21 and 22: 1420MHz System
Page 23: Summary ● EISCAT used for observi

Observing the Solar Wind with Interplanetary Scintillation

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