Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 5 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)
 05/23/2021   10:39:18   (  -0.00,-137.19) (   0.22,-138.28)  123.21                80
 05/24/2021   10:17:53   (  -0.01,-137.18) (  -0.76,-133.74)  392.13                80
 05/25/2021   22:42:31   (   0.01,-137.17) (  -0.44,-139.04)  214.36                80
 05/26/2021   22:21:07   (   0.01,-137.16) (   0.60,-134.52)  300.50                80
 05/28/2021   10:45:36   (  -0.01,-137.14) (   0.61,-139.79)  302.30                80
 05/29/2021   10:24:12   (  -0.01,-137.12) (  -0.43,-135.26)  212.09                80
 05/30/2021   22:46:09   (   0.01,-137.10) (  -0.76,-140.57)  395.69                80
 05/31/2021   22:30:05   (   0.01,-137.08) (   0.22,-136.03)  118.73                80
 06/02/2021   10:51:54   (  -0.00,-137.06) (   0.93,-141.31)  484.43                80
 06/03/2021   10:30:30   (  -0.01,-137.04) (  -0.05,-136.78)   29.84                80
 06/05/2021   22:33:44   (   0.00,-136.99) (  -0.09,-137.56)   64.44                80