Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 5 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/20/2019   22:40:15   (  -0.00,-137.18) (  -0.43,-139.10)  218.80                80
 05/21/2019   22:24:10   (  -0.00,-137.18) (   0.56,-134.57)  296.82                80
 05/23/2019   10:45:59   (  -0.00,-137.19) (   0.58,-139.85)  302.78                80
 05/24/2019   10:24:35   (  -0.01,-137.18) (  -0.41,-135.31)  212.17                80
 05/25/2019   22:46:32   (   0.01,-137.13) (  -0.75,-140.62)  397.21                80
 05/26/2019   22:30:28   (   0.01,-137.12) (   0.24,-136.09)  117.91                80
 05/28/2019   10:52:16   (  -0.01,-137.13) (   0.95,-141.36)  481.74                80
 05/29/2019   10:30:53   (  -0.01,-137.12) (  -0.10,-136.84)   32.82                80
 05/31/2019   22:34:04   (   0.02,-137.04) (  -0.12,-137.60)   63.80                80
 06/01/2019   22:18:01   (   0.02,-137.03) (   0.93,-133.08)  450.36                80