Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/05/2021   10:24:12   (  -0.03,-137.21) (  -0.46,-135.28)  220.56                80
 01/06/2021   22:46:08   (   0.03,-137.22) (  -0.75,-140.58)  383.68                80
 01/07/2021   22:30:04   (   0.02,-137.22) (   0.26,-136.05)  132.80                80
 01/09/2021   10:51:51   (   0.00,-137.22) (   0.95,-141.31)  467.78                80
 01/10/2021   10:30:27   (   0.01,-137.21) (  -0.07,-136.78)   48.18                80
 01/12/2021   22:33:38   (  -0.01,-137.19) (  -0.12,-137.56)   42.35                80
 01/13/2021   22:17:34   (  -0.01,-137.18) (   0.90,-133.03)  473.09                80
 01/15/2021   10:39:22   (   0.01,-137.17) (   0.25,-138.31)  129.16                80
 01/16/2021   10:17:58   (   0.01,-137.16) (  -0.77,-133.78)  386.07                80
 01/17/2021   22:39:54   (  -0.01,-137.14) (  -0.42,-139.08)  220.33                80
 01/18/2021   22:23:50   (  -0.01,-137.13) (   0.60,-134.55)  294.81                80