Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/25/2019   22:36:26   (  -0.02,-137.19) (  -0.09,-137.55)   41.39                80
 12/26/2019   22:15:00   (  -0.02,-137.18) (   0.92,-133.02)  474.18                80
 12/28/2019   10:39:27   (   0.02,-137.16) (   0.28,-138.28)  127.81                80
 12/29/2019   10:18:01   (   0.02,-137.15) (  -0.73,-133.75)  387.46                80
 12/30/2019   22:42:37   (  -0.02,-137.13) (  -0.46,-139.05)  218.44                80
 12/31/2019   22:21:11   (  -0.02,-137.12) (   0.55,-134.51)  296.67                80
 01/02/2020   10:45:37   (   0.03,-137.10) (   0.65,-139.77)  305.87                80
 01/03/2020   10:24:12   (   0.02,-137.08) (  -0.36,-135.24)  208.98                80
 01/04/2020   22:48:47   (  -0.03,-137.05) (  -0.82,-140.54)  397.71                80
 01/05/2020   22:27:22   (  -0.03,-137.03) (   0.19,-136.01)  116.74                80
 01/07/2020   10:51:48   (   0.04,-137.00) (   1.01,-141.27)  487.02                80
 01/08/2020   10:30:23   (   0.03,-136.97) (  -0.00,-136.73)   26.88                80