Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 8 12.  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)
 08/12/2023   08:24:40   (   0.00,-104.72) (   0.06,-104.93)   25.16                80
 08/13/2023   08:03:14   (   0.00,-104.71) (  -0.98,-100.41)  491.52                80
 08/14/2023   20:25:08   (  -0.01,-104.70) (  -0.25,-105.69)  113.82                80
 08/15/2023   20:09:02   (  -0.01,-104.70) (   0.80,-101.16)  403.33                80
 08/17/2023   08:30:48   (   0.01,-104.72) (   0.40,-106.42)  194.32                80
 08/18/2023   08:09:22   (   0.01,-104.72) (  -0.64,-101.89)  322.66                80
 08/19/2023   20:31:15   (  -0.01,-104.70) (  -0.58,-107.18)  282.68                80
 08/20/2023   20:15:10   (  -0.01,-104.71) (   0.47,-102.65)  234.64                80
 08/22/2023   08:36:55   (   0.01,-104.73) (   0.72,-107.91)  362.45                80
 08/23/2023   08:15:29   (   0.01,-104.73) (  -0.27,-103.37)  154.40                80
 08/24/2023   20:37:23   (  -0.02,-104.70) (  -0.88,-108.67)  451.88                80
 08/25/2023   20:21:17   (  -0.02,-104.70) (   0.11,-104.13)   64.95                80