Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 7 3.  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)
 07/04/2023   07:34:29   ( -70.02,-117.49) 07/04/2023   07:35:02  ( -70.01,-117.53)    2.17                33
 07/04/2023   08:25:13   (  69.91,  49.98) 07/04/2023   08:24:29  (  69.91,  49.97)    0.49                44
 07/06/2023   23:00:48   (  70.51,-169.80) 07/06/2023   23:01:58  (  70.40,-168.73)   41.70                70
 07/06/2023   23:51:22   ( -69.99,  -1.67) 07/06/2023   23:51:33  ( -70.01,  -1.65)    2.37                11
 07/07/2023   00:42:06   (  69.88, 165.80) 07/07/2023   00:41:00  (  69.91, 165.85)    3.36                66
 07/09/2023   15:17:33   (  70.07, -53.33) 07/09/2023   15:18:35  (  70.05, -53.35)    2.28                62
 07/09/2023   16:08:15   ( -69.97, 114.14) 07/09/2023   16:08:05  ( -69.94, 114.13)    2.89                10
 07/09/2023   16:58:50   (  69.39, -77.70) 07/09/2023   16:57:40  (  69.39, -78.98)   50.04                70
 07/12/2023   07:34:24   (  70.00,  62.55) 07/12/2023   07:35:05  (  70.01,  62.47)    3.18                41
 07/12/2023   08:25:06   ( -69.90,-129.98) 07/12/2023   08:24:35  ( -69.91,-130.04)    2.68                31
 07/14/2023   23:00:49   ( -70.92,   9.55) 07/14/2023   23:01:56  ( -70.77,  11.84)   85.12                67
 07/14/2023   23:51:17   (  69.99, 178.34) 07/14/2023   23:51:35  (  70.01, 178.35)    2.27                18
 07/15/2023   00:41:59   ( -69.88, -14.18) 07/15/2023   00:41:05  ( -69.91, -14.16)    2.86                54