Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/16/2021   10:46:32   (   0.05,-137.20) (   0.63,-139.93)  310.93                80
 08/17/2021   10:25:08   (   0.04,-137.19) (  -0.36,-135.40)  204.64                80
 08/18/2021   22:47:05   (  -0.04,-137.18) (  -0.83,-140.70)  401.95                80
 08/19/2021   22:31:01   (  -0.04,-137.17) (   0.16,-136.17)  113.35                80
 08/21/2021   10:50:10   (   0.03,-137.16) (   0.96,-141.45)  488.46                80
 08/22/2021   10:34:06   (   0.02,-137.15) (  -0.03,-136.92)   26.62                80
 08/24/2021   22:34:39   (  -0.01,-137.12) (  -0.16,-137.69)   65.24                80
 08/25/2021   22:18:35   (  -0.02,-137.11) (   0.89,-133.17)  449.98                80
 08/27/2021   10:37:43   (   0.02,-137.10) (   0.29,-138.44)  152.12                80
 08/28/2021   10:21:39   (   0.02,-137.08) (  -0.70,-133.90)  362.62                80