Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 24.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 06/26/2023   06:44:02   ( -70.74,-105.95) 06/26/2023   06:45:11  ( -70.65,-104.20)   65.07                69
 06/26/2023   07:34:34   (  70.00,  62.53) 06/26/2023   07:34:48  (  70.00,  62.49)    1.64                14
 06/26/2023   08:25:16   ( -69.91,-130.02) 06/26/2023   08:24:18  ( -69.89,-130.03)    2.87                58
 06/28/2023   23:00:43   ( -70.06,  10.90) 06/28/2023   23:01:49  ( -70.09,  10.86)    2.77                66
 06/28/2023   23:51:27   (  69.95, 178.37) 06/28/2023   23:51:16  (  69.98, 178.35)    2.47                11
 06/29/2023   00:42:03   ( -69.54, -13.70) 06/29/2023   00:40:51  ( -69.60, -14.54)   32.98                72
 07/01/2023   15:17:36   ( -70.02, 126.73) 07/01/2023   15:18:17  ( -70.04, 126.70)    2.68                41
 07/01/2023   16:08:20   (  69.92, -65.80) 07/01/2023   16:07:44  (  69.93, -65.82)    1.51                36
 07/04/2023   06:43:57   (  70.62,  74.26) 07/04/2023   06:45:07  (  70.51,  75.64)   52.47                70
 07/04/2023   07:34:29   ( -69.99,-117.44) 07/04/2023   07:34:45  ( -69.97,-117.51)    3.46                16
 07/04/2023   08:25:13   (  69.89,  50.02) 07/04/2023   08:24:11  (  69.91,  50.05)    2.36                62
 07/06/2023   23:00:39   (  70.07,-169.10) 07/06/2023   23:01:40  (  70.07,-169.10)    0.81                61
 07/06/2023   23:51:21   ( -69.96,  -1.63) 07/06/2023   23:51:10  ( -69.98,  -1.61)    1.69                11
 07/07/2023   00:41:55   (  69.33, 166.60) 07/07/2023   00:40:45  (  69.41, 165.27)   52.97                70