Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 5 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/20/2021   22:36:13   (   0.01,-137.20) (  -0.07,-137.53)   38.12                80
 05/21/2021   22:14:49   (   0.01,-137.19) (   0.96,-133.01)  477.67                80
 05/23/2021   10:39:18   (  -0.00,-137.19) (   0.24,-138.27)  123.38                80
 05/24/2021   10:17:54   (  -0.01,-137.18) (  -0.79,-133.75)  391.87                80
 05/25/2021   22:42:31   (   0.01,-137.16) (  -0.40,-139.05)  215.05                80
 05/26/2021   22:21:07   (   0.01,-137.15) (   0.58,-134.52)  299.71                80
 05/28/2021   10:45:36   (  -0.01,-137.13) (   0.57,-139.80)  303.03                80
 05/29/2021   10:24:12   (  -0.01,-137.12) (  -0.41,-135.26)  211.31                80
 05/30/2021   22:46:09   (   0.01,-137.09) (  -0.78,-140.57)  396.86                80
 05/31/2021   22:30:06   (   0.01,-137.07) (   0.26,-136.04)  117.47                80
 06/02/2021   10:51:54   (  -0.00,-137.05) (   0.95,-141.31)  485.69                80