Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 12 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)
 12/10/2023   20:16:16   (   0.01,-104.66) (   0.41,-102.96)  194.73                80
 12/12/2023   08:38:04   (  -0.00,-104.69) (   0.77,-108.23)  402.97                80
 12/13/2023   08:16:40   (   0.00,-104.69) (  -0.24,-103.70)  113.35                80
 12/14/2023   20:38:36   (  -0.01,-104.66) (  -0.96,-109.00)  493.92                80
 12/15/2023   20:22:32   (  -0.01,-104.66) (   0.04,-104.47)   22.56                80
 12/18/2023   08:25:36   (   0.02,-104.69) (   0.12,-105.21)   58.73                80
 12/19/2023   08:04:11   (   0.02,-104.69) (  -0.89,-100.68)  457.71                80
 12/20/2023   20:26:07   (  -0.02,-104.66) (  -0.30,-105.98)  149.22                80
 12/21/2023   20:10:03   (  -0.02,-104.67) (   0.72,-101.45)  367.54                80
 12/23/2023   08:31:51   (   0.03,-104.70) (   0.46,-106.72)  229.51                80
 12/24/2023   08:10:27   (   0.03,-104.70) (  -0.56,-102.19)  286.99                80