Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/08/2021   22:34:31   (  -0.03,-137.21) (  -0.11,-137.68)   53.43                80
 08/09/2021   22:18:26   (  -0.03,-137.21) (   0.88,-133.15)  463.04                80
 08/11/2021   10:37:34   (   0.03,-137.21) (   0.31,-138.41)  138.15                80
 08/12/2021   10:21:31   (   0.03,-137.20) (  -0.73,-133.89)  377.94                80
 08/13/2021   22:40:48   (  -0.03,-137.20) (  -0.46,-139.20)  227.06                80
 08/14/2021   22:24:44   (  -0.03,-137.20) (   0.53,-134.66)  288.53                80
 08/16/2021   10:43:52   (   0.02,-137.18) (   0.66,-139.93)  314.13                80
 08/17/2021   10:27:49   (   0.01,-137.17) (  -0.39,-135.41)  200.62                80
 08/18/2021   22:47:06   (   0.01,-137.15) (  -0.80,-140.71)  406.67                80
 08/19/2021   22:31:02   (   0.01,-137.13) (   0.25,-136.19)  108.05                80