Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 12 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/06/2021   10:44:46   (  -0.00,-137.19) (   0.65,-140.01)  321.31                80
 12/07/2021   10:28:40   (   0.00,-137.18) (  -0.38,-135.47)  194.79                80
 12/08/2021   22:47:54   (   0.00,-137.17) (  -0.83,-140.77)  410.80                80
 12/09/2021   22:31:49   (   0.00,-137.16) (   0.20,-136.24)  105.21                80
 12/11/2021   10:50:55   (  -0.00,-137.15) (   0.96,-141.51)  495.95                80
 12/12/2021   10:34:49   (  -0.00,-137.14) (  -0.02,-136.96)   20.16                80
 12/14/2021   22:35:18   (  -0.00,-137.12) (  -0.16,-137.73)   70.31                80
 12/15/2021   22:19:12   (  -0.00,-137.10) (   0.87,-133.20)  445.21                80
 12/17/2021   10:38:17   (   0.01,-137.08) (   0.34,-138.45)  157.04                80
 12/18/2021   10:22:12   (   0.01,-137.07) (  -0.69,-133.92)  357.93                80