Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 6 17.  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)
 06/17/2023   20:16:07   (   0.02,-104.71) (   0.41,-102.80)  216.74                80
 06/19/2023   08:37:55   (  -0.02,-104.72) (   0.76,-108.08)  383.10                80
 06/20/2023   08:16:30   (  -0.02,-104.72) (  -0.28,-103.55)  133.08                80
 06/21/2023   20:38:27   (   0.03,-104.71) (  -0.89,-108.86)  472.60                80
 06/22/2023   20:22:21   (   0.03,-104.71) (   0.10,-104.32)   44.15                80
 06/25/2023   08:25:24   (  -0.03,-104.73) (   0.02,-105.07)   38.07                80
 06/26/2023   08:03:58   (  -0.03,-104.73) (  -0.97,-100.53)  478.61                80
 06/27/2023   20:25:55   (   0.04,-104.72) (  -0.19,-105.84)  126.85                80
 06/28/2023   20:09:49   (   0.04,-104.73) (   0.80,-101.30)  389.94                80
 06/30/2023   08:31:37   (  -0.04,-104.74) (   0.36,-106.58)  208.92                80
 07/01/2023   08:10:11   (  -0.05,-104.74) (  -0.63,-102.04)  307.21                80