Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/22/2021   22:48:12   (  -0.01,-137.20) (  -0.81,-140.81)  412.32                80
 11/23/2021   22:32:06   (  -0.01,-137.19) (   0.21,-136.28)  103.35                80
 11/25/2021   10:53:53   (   0.01,-137.17) (   0.97,-141.55)  498.77                80
 11/26/2021   10:35:07   (   0.01,-137.16) (  -0.05,-137.02)   16.74                80
 11/28/2021   22:35:36   (  -0.00,-137.12) (  -0.14,-137.78)   75.34                80
 11/29/2021   22:19:29   (  -0.01,-137.10) (   0.83,-133.24)  439.59                80
 12/01/2021   10:41:16   (   0.00,-137.07) (   0.34,-138.50)  163.64                80
 12/02/2021   10:19:50   (   0.01,-137.05) (  -0.68,-133.97)  350.65                80
 12/03/2021   22:41:45   (  -0.00,-137.01) (  -0.52,-139.27)  257.99                80
 12/04/2021   22:25:39   (  -0.00,-136.98) (   0.50,-134.74)  255.68                80