Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 7 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)
 07/04/2023   07:34:29   ( -70.02,-117.49) 07/04/2023   07:35:02  ( -70.01,-117.52)    1.51                33
 07/04/2023   08:25:13   (  69.91,  49.99) 07/04/2023   08:24:29  (  69.91,  49.98)    0.79                44
 07/06/2023   23:00:48   (  70.51,-169.79) 07/06/2023   23:01:58  (  70.40,-168.72)   41.35                70
 07/06/2023   23:51:22   ( -69.99,  -1.66) 07/06/2023   23:51:34  ( -69.96,  -1.72)    3.34                12
 07/07/2023   00:42:06   (  69.88, 165.81) 07/07/2023   00:41:01  (  69.86, 165.78)    2.56                65
 07/09/2023   15:17:33   (  70.06, -53.32) 07/09/2023   15:18:35  (  70.05, -53.35)    1.40                62
 07/09/2023   16:08:15   ( -69.96, 114.15) 07/09/2023   16:08:05  ( -69.95, 114.14)    1.59                10
 07/09/2023   16:58:50   (  69.38, -77.69) 07/09/2023   16:57:40  (  69.40, -78.97)   50.18                70
 07/12/2023   07:34:25   (  70.04,  62.48) 07/12/2023   07:35:05  (  70.01,  62.48)    3.39                40
 07/12/2023   08:25:07   ( -69.94,-130.04) 07/12/2023   08:24:35  ( -69.91,-130.03)    3.30                32
 07/14/2023   23:00:49   ( -70.91,   9.56) 07/14/2023   23:01:56  ( -70.78,  11.84)   84.48                67
 07/14/2023   23:51:17   (  69.98, 178.35) 07/14/2023   23:51:35  (  70.01, 178.36)    3.42                18
 07/15/2023   00:41:59   ( -69.87, -14.17) 07/15/2023   00:41:06  ( -69.85, -14.23)    3.11                53