Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 12 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/22/2021   10:44:27   (  -0.01,-137.21) (   0.62,-139.96)  313.52                80
 12/23/2021   10:28:22   (  -0.01,-137.21) (  -0.41,-135.43)  203.18                80
 12/24/2021   22:47:36   (   0.01,-137.20) (  -0.79,-140.72)  402.14                80
 12/25/2021   22:31:30   (   0.01,-137.19) (   0.25,-136.19)  114.35                80
 12/27/2021   10:50:36   (  -0.02,-137.19) (   0.95,-141.45)  485.62                80
 12/28/2021   10:34:30   (  -0.01,-137.18) (  -0.09,-136.92)   30.50                80
 12/30/2021   22:34:58   (   0.00,-137.14) (  -0.12,-137.67)   60.51                80
 12/31/2021   22:18:52   (  -0.01,-137.13) (   0.86,-133.13)  454.85                80
 01/02/2022   10:40:38   (   0.01,-137.11) (   0.28,-138.40)  147.01                80
 01/03/2022   10:19:11   (   0.01,-137.09) (  -0.71,-133.86)  367.67                80