Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 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)
 09/25/2019   22:40:41   (   0.02,-137.20) (  -0.42,-139.08)  215.38                80
 09/26/2019   22:24:36   (   0.02,-137.19) (   0.61,-134.55)  300.64                80
 09/28/2019   10:43:44   (  -0.02,-137.18) (   0.60,-139.81)  300.78                80
 09/29/2019   10:27:39   (  -0.01,-137.17) (  -0.43,-135.28)  215.13                80
 09/30/2019   22:46:54   (  -0.00,-137.16) (  -0.80,-140.57)  389.99                80
 10/01/2019   22:30:50   (  -0.02,-137.15) (   0.23,-136.04)  125.88                80
 10/03/2019   10:52:37   (   0.02,-137.13) (   0.97,-141.31)  476.53                80
 10/04/2019   10:31:13   (   0.02,-137.11) (  -0.06,-136.78)   38.39                80
 10/06/2019   22:34:24   (  -0.02,-137.07) (  -0.13,-137.54)   53.49                80
 10/07/2019   22:18:19   (  -0.02,-137.05) (   0.90,-133.01)  461.14                80
 10/09/2019   10:40:06   (   0.02,-137.02) (   0.30,-138.27)  142.31                80