Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 12 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/27/2021   10:50:36   (  -0.03,-137.21) (   0.95,-141.45)  483.76                80
 12/28/2021   10:34:30   (  -0.02,-137.21) (  -0.09,-136.92)   32.85                80
 12/30/2021   22:34:58   (   0.01,-137.19) (  -0.12,-137.67)   56.09                80
 12/31/2021   22:18:53   (   0.00,-137.18) (   0.92,-133.14)  459.90                80
 01/02/2022   10:37:58   (   0.00,-137.16) (   0.28,-138.40)  141.78                80
 01/03/2022   10:19:11   (   0.01,-137.14) (  -0.71,-133.86)  373.57                80
 01/04/2022   22:41:06   (  -0.01,-137.11) (  -0.48,-139.16)  233.19                80
 01/05/2022   22:25:00   (  -0.01,-137.10) (   0.56,-134.63)  282.05                80
 01/07/2022   10:46:46   (   0.01,-137.08) (   0.63,-139.89)  320.12                80
 01/08/2022   10:25:19   (   0.01,-137.06) (  -0.36,-135.35)  194.94                80
 01/09/2022   22:47:13   (  -0.01,-137.03) (  -0.82,-140.64)  412.26                80