Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 29.  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   15:17:36   ( -70.05, 126.70) 07/01/2023   15:18:31  ( -70.05, 126.65)    2.07                55
 07/01/2023   16:08:20   (  69.93, -65.82) 07/01/2023   16:07:58  (  69.95, -65.85)    1.92                22
 07/01/2023   16:58:48   ( -69.10, 102.70) 07/01/2023   16:57:40  ( -69.18, 100.74)   78.03                68
 07/04/2023   07:34:29   ( -70.01,-117.47) 07/04/2023   07:35:05  ( -70.02,-117.53)    2.54                36
 07/04/2023   08:25:13   (  69.90,  50.00) 07/04/2023   08:24:32  (  69.91,  49.96)    1.79                41
 07/06/2023   23:00:51   (  70.66,-170.03) 07/06/2023   23:02:00  (  70.55,-168.51)   57.24                69
 07/06/2023   23:51:23   ( -70.03,  -1.73) 07/06/2023   23:51:38  ( -70.01,  -1.67)    3.03                15
 07/07/2023   00:42:06   (  69.87, 165.81) 07/07/2023   00:41:05  (  69.91, 165.83)    3.55                61
 07/09/2023   15:17:33   (  70.06, -53.31) 07/09/2023   15:18:41  (  70.09, -53.32)    3.46                68
 07/09/2023   16:08:15   ( -69.95, 114.16) 07/09/2023   16:08:12  ( -69.93, 114.09)    3.65                 3
 07/09/2023   16:58:53   (  69.59, -77.99) 07/09/2023   16:57:41  (  69.66, -78.65)   26.66                72
 07/12/2023   07:34:25   (  70.04,  62.48) 07/12/2023   07:35:13  (  70.04,  62.47)    0.77                48
 07/12/2023   08:25:07   ( -69.93,-130.04) 07/12/2023   08:24:43  ( -69.94,-130.03)    0.27                24