Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 8 2.  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)
 08/02/2023   15:17:24   ( -70.86, 125.48) 08/02/2023   15:18:31  ( -70.78, 127.74)   83.09                67
 08/02/2023   16:07:53   (  69.96, -65.79) 08/02/2023   16:08:11  (  69.98, -65.80)    1.63                18
 08/02/2023   16:58:35   ( -69.87, 101.66) 08/02/2023   16:57:41  ( -69.86, 101.67)    1.71                54
 08/05/2023   07:34:02   ( -70.13,-117.57) 08/05/2023   07:35:14  ( -70.11,-117.37)    7.60                72
 08/05/2023   08:24:45   (  69.96,  49.99) 08/05/2023   08:24:42  (  69.96,  50.06)    2.74                 3
 08/05/2023   09:15:26   ( -69.82,-142.48) 08/05/2023   09:14:12  ( -69.85,-142.47)    3.04                74
 08/07/2023   23:50:52   ( -70.03,  -1.63) 08/07/2023   23:51:46  ( -70.02,  -1.62)    0.81                54
 08/08/2023   00:41:36   (  69.92, 165.84) 08/08/2023   00:41:13  (  69.92, 165.88)    1.60                23
 08/08/2023   01:32:04   ( -69.08, -25.64) 08/08/2023   01:30:56  ( -69.09, -27.60)   77.90                68
 08/10/2023   16:07:43   ( -69.99, 114.21) 08/10/2023   16:08:16  ( -70.01, 114.24)    2.67                33
 08/10/2023   16:58:27   (  69.88, -78.33) 08/10/2023   16:57:43  (  69.90, -78.26)    3.32                44
 08/13/2023   07:33:59   (  70.48,  61.91) 08/13/2023   07:35:09  (  70.40,  63.06)   43.56                70
 08/13/2023   08:24:33   ( -69.96,-129.96) 08/13/2023   08:24:45  ( -69.97,-129.93)    1.90                12
 08/13/2023   09:15:17   (  69.85,  37.50) 08/13/2023   09:14:12  (  69.86,  37.56)    2.44                65
 08/15/2023   23:50:42   (  70.03, 178.39) 08/15/2023   23:51:45  (  70.00, 178.37)    3.06                63
 08/16/2023   00:41:24   ( -69.93, -14.14) 08/16/2023   00:41:15  ( -69.90, -14.14)    3.37                 9