Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/30/2020   10:36:40   (  -0.00,-137.22) (   0.23,-138.29)  121.17                80
 12/31/2020   10:20:36   (   0.00,-137.22) (  -0.78,-133.76)  394.61                80
 01/01/2021   22:39:52   (   0.00,-137.20) (  -0.43,-139.06)  211.85                80
 01/02/2021   22:23:48   (   0.01,-137.20) (   0.58,-134.53)  303.36                80
 01/04/2021   10:45:36   (  -0.02,-137.19) (   0.57,-139.81)  298.95                80
 01/05/2021   10:24:12   (  -0.02,-137.17) (  -0.44,-135.28)  216.04                80
 01/06/2021   22:46:08   (   0.02,-137.15) (  -0.77,-140.58)  391.41                80
 01/07/2021   22:30:03   (   0.02,-137.13) (   0.25,-136.05)  123.42                80
 01/09/2021   10:49:11   (   0.00,-137.11) (   0.96,-141.31)  479.20                80
 01/10/2021   10:30:26   (   0.01,-137.09) (  -0.05,-136.78)   35.04                80