Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/11/2021   10:40:15   (   0.04,-137.20) (   0.30,-138.42)  138.38                80
 08/12/2021   10:18:50   (   0.04,-137.20) (  -0.69,-133.88)  377.59                80
 08/13/2021   22:40:48   (  -0.04,-137.19) (  -0.50,-139.19)  227.80                80
 08/14/2021   22:24:44   (  -0.04,-137.18) (   0.55,-134.67)  287.70                80
 08/16/2021   10:46:32   (   0.04,-137.17) (   0.64,-139.93)  314.74                80
 08/17/2021   10:25:08   (   0.03,-137.16) (  -0.35,-135.40)  200.05                80
 08/18/2021   22:47:05   (  -0.02,-137.13) (  -0.84,-140.70)  407.30                80
 08/19/2021   22:31:02   (  -0.00,-137.12) (   0.21,-136.18)  106.76                80
 08/21/2021   10:50:10   (  -0.01,-137.09) (   0.98,-141.45)  496.89                80
 08/22/2021   10:34:07   (  -0.01,-137.08) (  -0.07,-136.93)   17.87                80
 08/24/2021   22:34:39   (   0.00,-137.03) (  -0.12,-137.70)   75.54                80