Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 20.  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)
 08/21/2023   10:37:47   (   0.01,-137.01) (   0.26,-138.19)  134.95                80
 08/22/2023   10:16:22   (   0.01,-137.00) (  -0.72,-133.66)  380.56                80
 08/23/2023   22:38:19   (  -0.01,-136.99) (  -0.46,-138.97)  226.03                80
 08/24/2023   22:22:16   (  -0.01,-136.98) (   0.58,-134.45)  288.91                80
 08/26/2023   10:44:04   (   0.02,-136.96) (   0.63,-139.72)  314.09                80
 08/27/2023   10:22:40   (   0.02,-136.94) (  -0.36,-135.19)  200.23                80
 08/28/2023   22:44:37   (  -0.03,-136.91) (  -0.81,-140.50)  408.00                80
 08/29/2023   22:28:33   (  -0.03,-136.90) (   0.18,-135.96)  106.10                80
 08/31/2023   10:50:21   (   0.03,-136.87) (   1.02,-141.24)  497.63                80
 09/01/2023   10:28:56   (   0.03,-136.85) (   0.02,-136.70)   16.48                80