Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 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)
 12/14/2020   10:36:37   (  -0.01,-137.22) (   0.21,-138.26)  118.19                80
 12/15/2020   10:20:33   (  -0.00,-137.22) (  -0.80,-133.73)  397.59                80
 12/16/2020   22:39:49   (   0.00,-137.21) (  -0.43,-139.03)  208.66                80
 12/17/2020   22:23:44   (  -0.00,-137.20) (   0.58,-134.50)  306.86                80
 12/19/2020   10:42:53   (  -0.00,-137.19) (   0.58,-139.78)  295.08                80
 12/20/2020   10:26:48   (  -0.00,-137.18) (  -0.43,-135.25)  220.27                80
 12/21/2020   22:46:06   (   0.00,-137.17) (  -0.74,-140.56)  386.45                80
 12/22/2020   22:30:01   (   0.00,-137.16) (   0.27,-136.03)  128.77                80
 12/24/2020   10:49:08   (  -0.00,-137.14) (   0.95,-141.29)  473.68                80
 12/25/2020   10:33:04   (   0.00,-137.13) (  -0.06,-136.76)   41.23                80
 12/27/2020   22:33:37   (  -0.01,-137.08) (  -0.09,-137.55)   52.28                80