Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 8 10.  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) (   0.07,-104.93)   25.17                80
 08/13/2023   08:03:14   (   0.01,-104.71) (  -0.98,-100.41)  491.53                80
 08/14/2023   20:25:08   (  -0.01,-104.70) (  -0.25,-105.69)  113.91                80
 08/15/2023   20:09:02   (  -0.01,-104.70) (   0.80,-101.16)  403.25                80
 08/17/2023   08:30:47   (   0.02,-104.72) (   0.40,-106.42)  194.22                80
 08/18/2023   08:09:21   (   0.02,-104.72) (  -0.59,-101.88)  322.78                80
 08/19/2023   20:31:15   (  -0.02,-104.70) (  -0.57,-107.18)  282.66                80
 08/20/2023   20:15:09   (  -0.02,-104.70) (   0.43,-102.64)  234.69                80
 08/22/2023   08:36:55   (   0.02,-104.73) (   0.70,-107.92)  362.21                80
 08/23/2023   08:15:29   (   0.02,-104.73) (  -0.29,-103.38)  154.69                80