Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 8 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 08/14/2023   20:25:09   (   0.03,-104.69) (  -0.19,-105.70)  115.84                80
 08/15/2023   20:09:02   (   0.04,-104.70) (   0.80,-101.16)  401.95                80
 08/17/2023   08:30:48   (  -0.04,-104.72) (   0.34,-106.43)  194.96                80
 08/18/2023   08:09:22   (  -0.04,-104.73) (  -0.65,-101.89)  322.78                80
 08/19/2023   20:31:16   (   0.04,-104.73) (  -0.52,-107.19)  281.44                80
 08/20/2023   20:15:11   (   0.04,-104.74) (   0.53,-102.67)  236.67                80
 08/22/2023   08:36:56   (  -0.05,-104.77) (   0.66,-107.93)  359.64                80
 08/23/2023   08:15:30   (  -0.05,-104.77) (  -0.34,-103.38)  157.96                80
 08/24/2023   20:37:24   (   0.05,-104.76) (  -0.82,-108.69)  447.32                80
 08/25/2023   20:21:18   (   0.05,-104.77) (   0.18,-104.15)   70.19                80