HMI MDI Comparison Y. Liu. CR 2104 CR 2109 MDI = 1.2 * HMI 720s / 45s.
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HMI MDI Comparison Y. Liu
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Transcript of HMI MDI Comparison Y. Liu. CR 2104 CR 2109 MDI = 1.2 * HMI 720s / 45s.
HMI MDI Comparison
Y. Liu
CR 2104
CR 2109
MDI = 1.2 * HMI 720s / 45s
Mean Field
HMI Magnetic Field Noise Pattern
• Gaussian with of 10000 magnetograms
MDI Magnetic Field Noise Pattern
• MDI has pronounced spatial noise pattern
HMI & MDI Doppler/Magnetic Leakage
Synoptic HMI/MDI Noise Comparisonvs Longitude
• Average line-of-sight magnetic field versus sine latitude observed in HMI synoptic map
Synoptic / Synchronic
• Features are stretched far from reference
Time-of-Day Variation - 01 UT and 13 UT
