Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/06/2021   22:31:20   (  -0.04,-137.24) (   0.19,-136.18)  120.64                80
 10/08/2021   10:50:28   (   0.04,-137.26) (   0.98,-141.45)  478.19                80
 10/09/2021   10:34:23   (   0.04,-137.26) (  -0.03,-136.92)   39.26                80
 10/11/2021   22:34:56   (  -0.03,-137.28) (  -0.10,-137.70)   47.16                80
 10/12/2021   22:18:52   (  -0.03,-137.28) (   0.91,-133.17)  469.56                80
 10/14/2021   10:38:00   (   0.02,-137.28) (   0.26,-138.44)  131.26                80
 10/15/2021   10:21:56   (   0.02,-137.28) (  -0.76,-133.90)  385.24                80
 10/16/2021   22:41:12   (  -0.02,-137.28) (  -0.44,-139.20)  218.79                80
 10/17/2021   22:25:07   (  -0.02,-137.28) (   0.58,-134.67)  297.72                80
 10/19/2021   10:44:16   (   0.01,-137.28) (   0.59,-139.94)  303.20                80