Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/30/2020   10:36:40   (  -0.02,-137.22) (   0.24,-138.29)  121.59                80
 12/31/2020   10:20:36   (  -0.02,-137.22) (  -0.77,-133.76)  394.19                80
 01/01/2021   22:39:53   (   0.02,-137.21) (  -0.39,-139.07)  212.21                80
 01/02/2021   22:23:49   (   0.03,-137.20) (   0.63,-134.54)  303.12                80
 01/04/2021   10:45:37   (  -0.03,-137.19) (   0.53,-139.82)  298.98                80
 01/05/2021   10:24:11   (  -0.03,-137.18) (  -0.43,-135.27)  216.10                80
 01/06/2021   22:46:09   (   0.03,-137.15) (  -0.72,-140.59)  391.23                80
 01/07/2021   22:30:04   (   0.03,-137.14) (   0.29,-136.06)  123.58                80
 01/09/2021   10:49:12   (  -0.02,-137.12) (   0.92,-141.32)  479.38                80
 01/10/2021   10:33:07   (  -0.00,-137.10) (  -0.10,-136.79)   35.21                80
 01/12/2021   22:33:38   (  -0.02,-137.03) (  -0.15,-137.55)   59.51                80