Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/03/2021   10:44:12   (   0.04,-137.21) (   0.64,-139.95)  311.23                80
 10/04/2021   10:28:08   (   0.04,-137.21) (  -0.37,-135.41)  205.24                80
 10/05/2021   22:47:24   (  -0.03,-137.21) (  -0.84,-140.71)  399.30                80
 10/06/2021   22:31:19   (  -0.03,-137.21) (   0.17,-136.18)  116.95                80
 10/08/2021   10:50:28   (   0.03,-137.20) (   0.99,-141.45)  484.46                80
 10/09/2021   10:34:23   (   0.03,-137.19) (  -0.02,-136.92)   31.13                80
 10/11/2021   22:34:55   (  -0.03,-137.16) (  -0.17,-137.68)   60.20                80
 10/12/2021   22:18:51   (  -0.03,-137.15) (   0.84,-133.15)  454.65                80
 10/14/2021   10:37:59   (   0.02,-137.12) (   0.33,-138.42)  148.69                80
 10/15/2021   10:21:54   (   0.02,-137.10) (  -0.69,-133.89)  365.93                80