Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/27/2020   22:33:37   (   0.01,-137.23) (  -0.04,-137.55)   36.82                80
 12/28/2020   22:17:33   (   0.01,-137.23) (   0.97,-133.02)  479.53                80
 12/30/2020   10:36:40   (   0.00,-137.22) (   0.24,-138.29)  121.17                80
 12/31/2020   10:20:36   (   0.01,-137.22) (  -0.77,-133.76)  394.55                80
 01/01/2021   22:39:52   (  -0.01,-137.20) (  -0.45,-139.06)  212.12                80
 01/02/2021   22:23:48   (  -0.01,-137.19) (   0.56,-134.53)  303.23                80
 01/04/2021   10:42:56   (   0.00,-137.18) (   0.59,-139.80)  298.80                80
 01/05/2021   10:26:51   (   0.00,-137.17) (  -0.42,-135.27)  216.08                80
 01/06/2021   22:46:08   (   0.00,-137.14) (  -0.79,-140.57)  391.68                80
 01/07/2021   22:30:03   (  -0.00,-137.13) (   0.22,-136.04)  123.04                80
 01/09/2021   10:49:12   (   0.01,-137.11) (   0.93,-141.32)  479.96                80