Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 12 26.  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)
 12/28/2023   08:38:05   (   0.01,-104.70) (   0.79,-108.22)  401.13                80
 12/29/2023   08:16:39   (   0.02,-104.69) (  -0.18,-103.68)  115.41                80
 12/30/2023   20:38:36   (  -0.02,-104.66) (  -0.98,-108.98)  491.94                80
 12/31/2023   20:22:30   (  -0.02,-104.67) (   0.00,-104.44)   25.23                80
 01/03/2024   08:25:34   (  -0.02,-104.71) (   0.08,-105.19)   55.08                80
 01/04/2024   08:04:09   (  -0.02,-104.71) (  -0.90,-100.65)  461.79                80
 01/05/2024   20:26:04   (  -0.01,-104.68) (  -0.30,-105.95)  144.73                80
 01/06/2024   20:09:59   (  -0.01,-104.68) (   0.75,-101.42)  372.37                80
 01/08/2024   08:31:47   (   0.01,-104.72) (   0.43,-106.69)  223.91                80
 01/09/2024   08:10:21   (   0.01,-104.72) (  -0.57,-102.15)  292.51                80