Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 6 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/14/2021   10:24:23   (   0.01,-137.20) (  -0.42,-135.29)  217.18                80
 06/15/2021   22:49:00   (  -0.01,-137.19) (  -0.78,-140.60)  388.67                80
 06/16/2021   22:27:37   (  -0.01,-137.18) (   0.25,-136.07)  126.74                80
 06/18/2021   10:52:06   (   0.02,-137.17) (   0.93,-141.35)  474.98                80
 06/19/2021   10:30:42   (   0.01,-137.16) (  -0.05,-136.81)   40.09                80
 06/21/2021   22:36:36   (  -0.00,-137.13) (  -0.12,-137.59)   52.71                80
 06/22/2021   22:15:12   (   0.00,-137.11) (   0.91,-133.06)  461.48                80
 06/24/2021   10:39:41   (  -0.01,-137.09) (   0.26,-138.34)  142.37                80
 06/25/2021   10:18:17   (  -0.01,-137.07) (  -0.71,-133.80)  371.42                80
 06/26/2021   22:40:14   (   0.01,-137.03) (  -0.48,-139.11)  237.36                80
 06/27/2021   22:24:11   (   0.01,-137.01) (   0.56,-134.58)  276.40                80