Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/29/2021   22:19:31   (  -0.00,-137.20) (   0.90,-133.25)  450.03                80
 12/01/2021   10:38:37   (  -0.00,-137.19) (   0.27,-138.52)  151.19                80
 12/02/2021   10:22:30   (   0.00,-137.18) (  -0.70,-133.97)  364.70                80
 12/03/2021   22:41:46   (  -0.00,-137.16) (  -0.45,-139.28)  241.36                80
 12/04/2021   22:25:39   (  -0.01,-137.14) (   0.51,-134.74)  273.94                80
 12/06/2021   10:44:46   (   0.01,-137.12) (   0.65,-140.01)  328.87                80
 12/07/2021   10:28:40   (   0.01,-137.10) (  -0.38,-135.47)  185.93                80
 12/08/2021   22:47:54   (  -0.01,-137.07) (  -0.83,-140.77)  421.45                80
 12/09/2021   22:31:49   (  -0.01,-137.05) (   0.21,-136.24)   93.35                80
 12/12/2021   10:34:49   (   0.00,-137.01) (  -0.02,-136.97)    5.01                80