Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/27/2021   10:40:23   (   0.05,-137.21) (   0.32,-138.43)  139.10                80
 08/28/2021   10:18:58   (   0.05,-137.21) (  -0.67,-133.89)  377.04                80
 08/29/2021   22:40:56   (  -0.04,-137.20) (  -0.51,-139.20)  228.35                80
 08/30/2021   22:24:52   (  -0.04,-137.20) (   0.54,-134.68)  287.35                80
 09/01/2021   10:46:41   (   0.04,-137.18) (   0.64,-139.95)  314.48                80
 09/02/2021   10:25:16   (   0.03,-137.17) (  -0.36,-135.41)  200.64                80
 09/03/2021   22:47:13   (  -0.02,-137.16) (  -0.82,-140.72)  406.45                80
 09/04/2021   22:31:09   (  -0.01,-137.14) (   0.18,-136.19)  108.32                80
 09/06/2021   10:50:17   (   0.00,-137.12) (   1.00,-141.46)  494.62                80
 09/07/2021   10:34:14   (   0.00,-137.11) (  -0.05,-136.94)   20.08                80