Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 7.  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)
 06/10/2023   06:44:08   ( -70.78,-106.00) 06/10/2023   06:45:17  ( -70.66,-104.36)   61.62                69
 06/10/2023   07:34:41   (  70.08,  62.41) 06/10/2023   07:34:53  (  70.06,  62.42)    1.75                12
 06/10/2023   08:25:22   ( -69.94,-130.06) 06/10/2023   08:24:23  ( -69.95,-130.11)    2.02                59
 06/12/2023   23:00:51   ( -70.16,  10.75) 06/12/2023   23:01:53  ( -70.16,  10.79)    1.20                62
 06/12/2023   23:51:35   (  70.04, 178.24) 06/12/2023   23:51:20  (  70.05, 178.28)    1.79                15
 06/13/2023   00:42:08   ( -69.48, -13.61) 06/13/2023   00:40:57  ( -69.55, -14.77)   46.11                71
 06/15/2023   15:17:44   ( -70.12, 126.58) 06/15/2023   15:18:19  ( -70.12, 126.62)    1.51                35
 06/15/2023   16:08:28   (  70.01, -65.95) 06/15/2023   16:07:46  (  70.01, -65.90)    1.90                42
 06/18/2023   06:44:01   (  70.46,  74.51) 06/18/2023   06:45:12  (  70.39,  75.25)   28.69                71
 06/18/2023   07:34:37   ( -70.04,-117.53) 06/18/2023   07:34:46  ( -70.06,-117.58)    3.03                 9
 06/18/2023   08:25:21   (  69.93,  49.94) 06/18/2023   08:24:13  (  69.95,  49.90)    2.02                68
 06/20/2023   23:00:49   (  70.12,-169.20) 06/20/2023   23:01:42  (  70.13,-169.23)    1.43                53
 06/20/2023   23:51:31   ( -70.02,  -1.73) 06/20/2023   23:51:12  ( -70.03,  -1.74)    1.04                19