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{{attachement:CompareTau.jpg|29-31 October Tau measurements}} |
Figure: 29-31 October Tau measurements {{attachement:CompareTau.jpg||height=450}} |
Describe OffProcNika2Run1Opacity here.
Discussion on opacities
Page last updated, FXD, 2015-10-31
Comparison with the IRAM taumeter
We use preliminary opacity measurements obtained with an early skydip (Tau1 and Tau2) on NIKA2 two frequencies. They are compared with the contemporary taumeter measurements at 225GHz. The statistics exist for the last three days only. It shows that the 3 Taus are consistent with each other. NIKA2 opacities are not absolutely calibrated but they follow each other very strictly (lower left panel). On the other hand, Tau1 and Tau225 follow each other but loosely. Sometimes, the taumeter shows more fluctuations around a correct median value than Tau1. Figure: 29-31 October Tau measurements