Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/24/2021   22:34:39   (  -0.05,-137.20) (  -0.16,-137.69)   55.65                80
 08/25/2021   22:18:35   (  -0.05,-137.20) (   0.89,-133.17)  460.94                80
 08/27/2021   10:40:23   (   0.04,-137.21) (   0.29,-138.43)  139.03                80
 08/28/2021   10:18:59   (   0.04,-137.21) (  -0.70,-133.90)  377.12                80
 08/29/2021   22:40:56   (  -0.04,-137.20) (  -0.48,-139.21)  228.76                80
 08/30/2021   22:24:52   (  -0.04,-137.19) (   0.51,-134.67)  286.91                80
 09/01/2021   10:46:40   (   0.03,-137.19) (   0.67,-139.94)  314.51                80
 09/02/2021   10:27:57   (   0.03,-137.18) (  -0.39,-135.42)  200.59                80
 09/03/2021   22:47:14   (  -0.01,-137.15) (  -0.79,-140.73)  407.10                80
 09/04/2021   22:31:09   (  -0.00,-137.14) (   0.20,-136.19)  107.64                80
 09/06/2021   10:50:18   (  -0.00,-137.12) (   0.98,-141.46)  494.75                80