Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 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)
 12/30/2021   22:34:59   (   0.02,-137.21) (  -0.08,-137.68)   53.36                80
 12/31/2021   22:18:52   (   0.01,-137.21) (   0.91,-133.14)  463.22                80
 01/02/2022   10:37:58   (   0.00,-137.20) (   0.29,-138.40)  137.38                80
 01/03/2022   10:21:52   (   0.01,-137.19) (  -0.76,-133.87)  378.66                80
 01/04/2022   22:41:07   (  -0.01,-137.17) (  -0.44,-139.17)  227.15                80
 01/05/2022   22:25:00   (  -0.01,-137.16) (   0.55,-134.63)  288.73                80
 01/07/2022   10:44:05   (   0.01,-137.15) (   0.64,-139.88)  312.47                80
 01/08/2022   10:28:00   (   0.01,-137.14) (  -0.40,-135.36)  203.22                80
 01/09/2022   22:47:14   (  -0.00,-137.11) (  -0.78,-140.65)  403.02                80
 01/10/2022   22:31:08   (  -0.01,-137.10) (   0.20,-136.11)  112.58                80