Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/16/2021   22:41:15   (  -0.03,-137.20) (  -0.49,-139.21)  229.14                80
 10/17/2021   22:25:12   (  -0.03,-137.20) (   0.51,-134.68)  286.81                80
 10/19/2021   10:44:22   (   0.03,-137.20) (   0.67,-139.95)  313.94                80
 10/20/2021   10:28:19   (   0.03,-137.20) (  -0.38,-135.44)  201.78                80
 10/21/2021   22:47:38   (  -0.03,-137.19) (  -0.81,-140.74)  404.93                80
 10/22/2021   22:31:34   (  -0.03,-137.18) (   0.18,-136.21)  110.35                80
 10/24/2021   10:50:44   (   0.02,-137.18) (   0.99,-141.49)  491.61                80
 10/25/2021   10:34:41   (   0.03,-137.16) (  -0.01,-136.96)   23.14                80
 10/27/2021   22:35:16   (  -0.02,-137.12) (  -0.18,-137.74)   70.95                80
 10/28/2021   22:19:13   (  -0.02,-137.11) (   0.87,-133.22)  443.24                80