Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 19.  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)
 06/20/2023   23:00:49   (  70.11,-169.19) 06/20/2023   23:01:50  (  70.11,-169.12)    2.56                61
 06/20/2023   23:51:30   ( -69.97,  -1.66) 06/20/2023   23:51:20  ( -70.00,  -1.65)    3.02                10
 06/21/2023   00:42:05   (  69.38, 166.52) 06/21/2023   00:40:55  (  69.45, 165.25)   50.65                70
 06/23/2023   15:17:42   (  70.05, -53.32) 06/23/2023   15:18:20  (  70.05, -53.33)    0.40                38
 06/23/2023   16:08:24   ( -69.96, 114.14) 06/23/2023   16:07:50  ( -69.94, 114.16)    2.16                34
 06/26/2023   06:44:03   ( -70.78,-106.02) 06/26/2023   06:45:11  ( -70.67,-104.17)   68.92                68
 06/26/2023   07:34:34   (  69.99,  62.54) 06/26/2023   07:34:48  (  70.01,  62.51)    2.38                14
 06/26/2023   08:25:16   ( -69.90,-130.00) 06/26/2023   08:24:18  ( -69.91,-130.00)    1.25                58
 06/28/2023   23:00:44   ( -70.10,  10.84) 06/28/2023   23:01:50  ( -70.07,  10.84)    3.53                66
 06/28/2023   23:51:27   (  69.94, 178.39) 06/28/2023   23:51:17  (  69.95, 178.32)    2.82                10
 06/29/2023   00:42:03   ( -69.53, -13.68) 06/29/2023   00:40:52  ( -69.58, -14.57)   34.89                71
 07/01/2023   15:17:37   ( -70.05, 126.68) 07/01/2023   15:18:18  ( -70.04, 126.69)    1.36                41
 07/01/2023   16:08:20   (  69.90, -65.78) 07/01/2023   16:07:45  (  69.92, -65.83)    3.29                35