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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/11/2021   22:34:55   (  -0.04,-137.18) (  -0.17,-137.68)   57.26                80
 10/12/2021   22:18:51   (  -0.04,-137.17) (   0.84,-133.15)  458.00                80
 10/14/2021   10:37:59   (   0.03,-137.16) (   0.32,-138.42)  144.12                80
 10/15/2021   10:21:54   (   0.02,-137.15) (  -0.69,-133.89)  370.94                80
 10/16/2021   22:41:11   (  -0.02,-137.12) (  -0.51,-139.19)  236.15                80
 10/17/2021   22:25:06   (  -0.02,-137.11) (   0.51,-134.66)  278.96                80
 10/19/2021   10:44:15   (   0.02,-137.09) (   0.66,-139.93)  323.26                80
 10/20/2021   10:28:10   (   0.02,-137.08) (  -0.36,-135.39)  191.62                80
 10/21/2021   22:47:26   (  -0.02,-137.04) (  -0.83,-140.70)  416.03                80
 10/22/2021   22:31:22   (  -0.02,-137.02) (   0.19,-136.16)   98.43                80