Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/13/2021   22:40:48   (  -0.05,-137.19) (  -0.50,-139.19)  227.66                80
 08/14/2021   22:24:44   (  -0.05,-137.18) (   0.55,-134.66)  287.84                80
 08/16/2021   10:46:32   (   0.04,-137.17) (   0.64,-139.93)  314.46                80
 08/17/2021   10:25:08   (   0.04,-137.16) (  -0.35,-135.40)  200.33                80
 08/18/2021   22:47:05   (  -0.03,-137.13) (  -0.84,-140.70)  407.03                80
 08/19/2021   22:31:01   (  -0.03,-137.12) (   0.15,-136.17)  107.48                80
 08/21/2021   10:50:10   (   0.01,-137.09) (   0.97,-141.45)  496.25                80
 08/22/2021   10:34:06   (   0.00,-137.08) (  -0.02,-136.92)   18.15                80
 08/24/2021   22:34:38   (  -0.00,-137.03) (  -0.17,-137.69)   75.20                80
 08/25/2021   22:18:35   (  -0.01,-137.02) (   0.88,-133.17)  439.25                80