Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 12 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/14/2021   22:35:18   (   0.01,-137.21) (  -0.13,-137.73)   60.59                80
 12/15/2021   22:19:13   (   0.01,-137.20) (   0.91,-133.20)  456.02                80
 12/17/2021   10:38:18   (  -0.00,-137.20) (   0.30,-138.46)  144.31                80
 12/18/2021   10:22:13   (   0.00,-137.19) (  -0.73,-133.93)  371.74                80
 12/19/2021   22:41:27   (  -0.00,-137.17) (  -0.48,-139.22)  234.60                80
 12/20/2021   22:25:21   (  -0.01,-137.16) (   0.56,-134.69)  281.02                80
 12/22/2021   10:44:27   (   0.01,-137.14) (   0.65,-139.95)  320.50                80
 12/23/2021   10:25:41   (   0.01,-137.13) (  -0.38,-135.42)  194.65                80
 12/24/2021   22:47:35   (  -0.01,-137.09) (  -0.82,-140.72)  412.93                80
 12/25/2021   22:31:30   (  -0.01,-137.08) (   0.22,-136.19)  102.03                80