Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 12 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/07/2021   10:28:40   (  -0.00,-137.20) (  -0.38,-135.47)  196.84                80
 12/08/2021   22:47:55   (   0.00,-137.20) (  -0.77,-140.78)  407.77                80
 12/09/2021   22:31:49   (   0.00,-137.20) (   0.20,-136.24)  109.19                80
 12/11/2021   10:50:55   (  -0.01,-137.21) (   0.96,-141.51)  490.06                80
 12/12/2021   10:34:50   (  -0.00,-137.21) (  -0.07,-136.98)   26.83                80
 12/14/2021   22:35:19   (   0.00,-137.20) (  -0.11,-137.74)   61.52                80
 12/15/2021   22:19:12   (  -0.00,-137.19) (   0.87,-133.20)  454.95                80
 12/17/2021   10:38:18   (   0.00,-137.19) (   0.29,-138.47)  145.36                80
 12/18/2021   10:22:13   (   0.01,-137.18) (  -0.74,-133.93)  370.54                80
 12/19/2021   22:41:27   (  -0.01,-137.16) (  -0.46,-139.23)  236.06                80
 12/20/2021   22:25:21   (  -0.00,-137.14) (   0.52,-134.69)  279.32                80