Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 5.  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)
 09/05/2023   20:15:27   (   0.01,-104.69) (   0.44,-102.74)  222.76                80
 09/07/2023   08:37:16   (  -0.01,-104.71) (   0.74,-108.01)  376.39                80
 09/08/2023   08:15:51   (  -0.01,-104.71) (  -0.26,-103.48)  139.51                80
 09/09/2023   20:37:48   (   0.01,-104.69) (  -0.90,-108.79)  467.77                80
 09/10/2023   20:21:44   (   0.01,-104.69) (   0.11,-104.26)   48.57                80
 09/13/2023   08:24:48   (  -0.00,-104.71) (   0.05,-105.01)   33.26                80
 09/14/2023   08:03:23   (  -0.00,-104.71) (  -0.95,-100.48)  483.07                80
 09/15/2023   20:25:20   (   0.00,-104.70) (  -0.25,-105.78)  123.72                80
 09/16/2023   20:09:15   (   0.00,-104.70) (   0.76,-101.25)  392.96                80
 09/18/2023   08:31:03   (  -0.00,-104.73) (   0.40,-106.52)  204.75                80
 09/19/2023   08:09:39   (  -0.00,-104.73) (  -0.61,-102.00)  311.48                80