Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 12 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/24/2021   22:47:36   (   0.02,-137.21) (  -0.76,-140.73)  401.05                80
 12/25/2021   22:31:31   (   0.02,-137.21) (   0.27,-136.20)  115.83                80
 12/27/2021   10:50:36   (  -0.02,-137.21) (   0.93,-141.45)  483.97                80
 12/28/2021   10:31:50   (  -0.02,-137.20) (  -0.05,-136.91)   32.60                80
 12/30/2021   22:34:58   (   0.01,-137.17) (  -0.10,-137.68)   57.35                80
 12/31/2021   22:18:52   (   0.00,-137.16) (   0.88,-133.14)  458.37                80
 01/02/2022   10:37:57   (   0.00,-137.14) (   0.31,-138.39)  143.20                80
 01/03/2022   10:19:12   (   0.01,-137.13) (  -0.73,-133.87)  371.96                80
 01/04/2022   22:41:06   (  -0.01,-137.09) (  -0.46,-139.16)  235.55                80
 01/05/2022   22:25:00   (  -0.01,-137.08) (   0.53,-134.62)  279.49                80