Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 6 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/08/2021   10:39:29   (   0.01,-137.19) (   0.24,-138.30)  126.09                80
 06/09/2021   10:18:04   (  -0.00,-137.20) (  -0.74,-133.77)  390.53                80
 06/10/2021   22:42:42   (   0.00,-137.20) (  -0.44,-139.07)  214.03                80
 06/11/2021   22:21:18   (   0.01,-137.20) (   0.60,-134.55)  302.15                80
 06/13/2021   10:45:46   (  -0.00,-137.20) (   0.60,-139.82)  298.56                80
 06/14/2021   10:24:23   (  -0.01,-137.20) (  -0.44,-135.29)  217.25                80
 06/15/2021   22:49:00   (   0.00,-137.19) (  -0.74,-140.60)  388.48                80
 06/16/2021   22:27:36   (   0.01,-137.18) (   0.25,-136.07)  127.11                80
 06/18/2021   10:52:05   (  -0.00,-137.18) (   0.91,-141.34)  474.51                80
 06/19/2021   10:30:41   (  -0.00,-137.17) (  -0.08,-136.81)   40.67                80
 06/21/2021   22:33:53   (   0.01,-137.13) (  -0.11,-137.58)   51.58                80