Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 10/21/2023   22:32:07   (   0.00,-137.00) (  -0.12,-137.52)   58.72                80
 10/22/2023   22:16:05   (   0.00,-137.00) (   0.91,-133.00)  456.32                80
 10/24/2023   10:35:15   (  -0.00,-137.00) (   0.27,-138.28)  145.43                80
 10/25/2023   10:19:12   (  -0.00,-136.99) (  -0.70,-133.75)  369.52                80
 10/26/2023   22:38:31   (   0.00,-136.97) (  -0.48,-139.06)  238.38                80
 10/27/2023   22:22:29   (   0.00,-136.97) (   0.56,-134.55)  276.38                80
 10/29/2023   10:41:38   (   0.00,-136.96) (   0.67,-139.81)  326.06                80
 10/30/2023   10:25:35   (   0.00,-136.95) (  -0.38,-135.30)  188.29                80
 10/31/2023   22:44:54   (  -0.01,-136.92) (  -0.85,-140.60)  420.69                80
 11/01/2023   22:28:50   (  -0.02,-136.90) (   0.14,-136.07)   93.57                80
 11/04/2023   10:29:18   (  -0.00,-136.86) (  -0.03,-136.84)    3.83                80