Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/25/2021   22:18:34   (  -0.05,-137.20) (   0.85,-133.16)  460.98                80
 08/27/2021   10:40:23   (   0.04,-137.21) (   0.33,-138.43)  139.21                80
 08/28/2021   10:18:59   (   0.04,-137.21) (  -0.72,-133.90)  376.88                80
 08/29/2021   22:40:57   (  -0.04,-137.20) (  -0.46,-139.21)  228.93                80
 08/30/2021   22:24:52   (  -0.04,-137.19) (   0.53,-134.68)  286.71                80
 09/01/2021   10:46:40   (   0.03,-137.18) (   0.65,-139.95)  314.94                80
 09/02/2021   10:25:16   (   0.03,-137.17) (  -0.35,-135.41)  200.10                80
 09/03/2021   22:47:13   (  -0.01,-137.15) (  -0.83,-140.72)  407.48                80
 09/04/2021   22:31:10   (  -0.00,-137.13) (   0.22,-136.20)  107.23                80
 09/06/2021   10:50:18   (  -0.00,-137.12) (   0.96,-141.47)  495.42                80
 09/07/2021   10:34:14   (  -0.00,-137.10) (  -0.04,-136.93)   19.11                80