Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 7 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/16/2021   10:24:48   (   0.04,-137.20) (  -0.38,-135.36)  210.62                80
 07/17/2021   22:49:26   (  -0.04,-137.21) (  -0.81,-140.66)  393.60                80
 07/18/2021   22:28:02   (  -0.03,-137.21) (   0.23,-136.14)  122.51                80
 07/20/2021   10:52:30   (   0.03,-137.20) (   0.98,-141.40)  478.86                80
 07/21/2021   10:31:07   (   0.02,-137.20) (  -0.06,-136.88)   36.51                80
 07/23/2021   22:37:01   (   0.00,-137.18) (  -0.09,-137.66)   54.63                80
 07/24/2021   22:15:37   (   0.01,-137.17) (   0.95,-133.14)  460.41                80
 07/26/2021   10:40:06   (  -0.02,-137.16) (   0.27,-138.40)  141.98                80
 07/27/2021   10:21:22   (  -0.02,-137.15) (  -0.77,-133.88)  373.38                80
 07/28/2021   22:40:38   (  -0.00,-137.14) (  -0.47,-139.17)  232.51                80