Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 12 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/28/2021   10:31:50   (  -0.02,-137.22) (  -0.07,-136.91)   34.13                80
 12/30/2021   22:34:59   (   0.01,-137.21) (  -0.09,-137.68)   53.43                80
 12/31/2021   22:18:52   (   0.00,-137.21) (   0.89,-133.14)  463.10                80
 01/02/2022   10:37:57   (   0.00,-137.20) (   0.30,-138.40)  137.52                80
 01/03/2022   10:21:52   (   0.01,-137.19) (  -0.74,-133.87)  378.49                80
 01/04/2022   22:41:06   (  -0.01,-137.17) (  -0.45,-139.16)  227.44                80
 01/05/2022   22:25:00   (  -0.01,-137.16) (   0.54,-134.62)  288.40                80
 01/07/2022   10:44:05   (   0.01,-137.14) (   0.65,-139.88)  312.74                80
 01/08/2022   10:28:00   (   0.01,-137.13) (  -0.39,-135.35)  202.95                80
 01/09/2022   22:47:14   (  -0.01,-137.11) (  -0.79,-140.65)  403.42                80
 01/10/2022   22:31:07   (  -0.01,-137.10) (   0.20,-136.11)  112.12                80