Presentation by Karl Menten - aerap
Presentation by Karl Menten - aerap
Presentation by Karl Menten - aerap
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The Very Long Baseline Array (VLBA)Angular resolution:q f ~l/D ~ 1 cm / 8000 km = 250 masCentroid Precision:0.5 q f / SNR ~ 10 masSystematics:path length errors ~ 2 cm (~2 l)• Radio waves “see” throughgalaxy• Can “synthesize” telescopethe size of the Earthshift position <strong>by</strong> ~ 2q f ~ 500 masRelative positions (to QSOs):DQ ~ 1 deg (0.02 rad)cancel systematics: DQ*2q f ~ 10 mas
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