Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/24/2020   10:49:09   (  -0.02,-137.22) (   0.90,-141.30)  465.60                80
 12/25/2020   10:33:05   (  -0.01,-137.21) (  -0.11,-136.77)   49.98                80
 12/27/2020   22:33:36   (   0.00,-137.18) (  -0.10,-137.54)   41.97                80
 12/28/2020   22:17:32   (  -0.01,-137.16) (   0.91,-133.01)  473.03                80
 12/30/2020   10:36:40   (   0.01,-137.15) (   0.24,-138.29)  129.59                80
 12/31/2020   10:20:36   (   0.01,-137.13) (  -0.77,-133.76)  384.72                80
 01/01/2021   22:39:52   (  -0.01,-137.09) (  -0.44,-139.06)  224.25                80
 01/02/2021   22:23:48   (  -0.01,-137.07) (   0.57,-134.53)  289.69                80
 01/04/2021   10:42:55   (   0.01,-137.04) (   0.64,-139.79)  314.09                80
 01/05/2021   10:26:50   (   0.01,-137.02) (  -0.37,-135.26)  199.52                80