Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/12/2021   10:18:50   (   0.05,-137.20) (  -0.68,-133.88)  377.72                80
 08/13/2021   22:40:47   (  -0.05,-137.19) (  -0.51,-139.18)  227.79                80
 08/14/2021   22:24:44   (  -0.05,-137.18) (   0.54,-134.66)  287.65                80
 08/16/2021   10:46:32   (   0.04,-137.17) (   0.65,-139.93)  314.78                80
 08/17/2021   10:25:08   (   0.04,-137.15) (  -0.34,-135.40)  199.95                80
 08/18/2021   22:47:05   (  -0.03,-137.13) (  -0.85,-140.70)  407.48                80
 08/19/2021   22:31:02   (  -0.03,-137.11) (   0.20,-136.18)  106.94                80
 08/21/2021   10:50:10   (   0.01,-137.09) (   0.99,-141.45)  496.91                80
 08/22/2021   10:34:05   (   0.00,-137.07) (  -0.01,-136.91)   17.58                80
 08/24/2021   22:34:39   (  -0.00,-137.03) (  -0.13,-137.70)   76.06                80
 08/25/2021   22:18:35   (  -0.01,-137.01) (   0.87,-133.16)  438.34                80