Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 30.  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)
 07/01/2023   15:17:37   ( -70.06, 126.67) 07/01/2023   15:18:31  ( -70.06, 126.66)    1.21                54
 07/01/2023   16:08:21   (  69.95, -65.85) 07/01/2023   16:07:58  (  69.95, -65.84)    0.41                23
 07/01/2023   16:58:49   ( -69.12, 102.67) 07/01/2023   16:57:41  ( -69.13, 100.68)   79.07                68
 07/04/2023   07:34:29   ( -70.03,-117.50) 07/04/2023   07:35:03  ( -70.02,-117.52)    1.13                34
 07/04/2023   08:25:13   (  69.92,  49.97) 07/04/2023   08:24:30  (  69.92,  49.98)    0.46                43
 07/06/2023   23:00:49   (  70.57,-169.89) 07/06/2023   23:01:59  (  70.46,-168.65)   47.86                70
 07/06/2023   23:51:22   ( -70.00,  -1.68) 07/06/2023   23:51:35  ( -70.02,  -1.65)    2.86                13
 07/07/2023   00:42:06   (  69.89, 165.79) 07/07/2023   00:41:02  (  69.91, 165.85)    3.39                64
 07/09/2023   15:17:33   (  70.08, -53.34) 07/09/2023   15:18:38  (  70.05, -53.37)    3.09                65
 07/09/2023   16:08:15   ( -69.97, 114.13) 07/09/2023   16:08:08  ( -69.94, 114.12)    3.12                 7
 07/09/2023   16:58:51   (  69.45, -77.79) 07/09/2023   16:57:41  (  69.51, -78.84)   41.53                70
 07/12/2023   07:34:26   (  70.06,  62.46) 07/12/2023   07:35:09  (  70.06,  62.53)    2.78                43
 07/12/2023   08:25:07   ( -69.90,-129.99) 07/12/2023   08:24:40  ( -69.90,-130.06)    2.91                27