Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 18.  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)
 08/18/2023   22:34:41   (  -0.02,-137.01) (  -0.14,-137.43)   49.69                80
 08/19/2023   22:13:17   (  -0.02,-137.01) (   0.90,-132.91)  466.31                80
 08/21/2023   10:37:47   (   0.02,-137.00) (   0.26,-138.19)  135.16                80
 08/22/2023   10:16:22   (   0.02,-137.00) (  -0.72,-133.66)  380.27                80
 08/23/2023   22:38:19   (  -0.02,-136.98) (  -0.46,-138.97)  226.30                80
 08/24/2023   22:22:15   (  -0.02,-136.97) (   0.52,-134.44)  288.55                80
 08/26/2023   10:44:04   (   0.03,-136.95) (   0.63,-139.72)  314.67                80
 08/27/2023   10:22:40   (   0.03,-136.94) (  -0.36,-135.19)  199.56                80
 08/28/2023   22:44:37   (  -0.04,-136.91) (  -0.82,-140.50)  408.66                80
 08/29/2023   22:25:53   (  -0.04,-136.89) (   0.17,-135.96)  105.33                80
 08/31/2023   10:50:21   (   0.04,-136.86) (   1.03,-141.23)  498.65                80