Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 5 31.  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)
 06/02/2023   06:44:11   (  70.82,  73.92) 06/02/2023   06:45:19  (  70.73,  75.76)   67.88                68
 06/02/2023   07:34:40   ( -70.06,-117.54) 06/02/2023   07:34:59  ( -70.07,-117.58)    1.93                19
 06/02/2023   08:25:24   (  69.99,  49.87) 06/02/2023   08:24:25  (  69.96,  49.92)    3.04                59
 06/04/2023   23:00:52   (  70.13,-169.20) 06/04/2023   23:01:57  (  70.14,-169.24)    1.77                65
 06/04/2023   23:51:34   ( -70.04,  -1.75) 06/04/2023   23:51:27  ( -70.03,  -1.76)    1.32                 7
 06/05/2023   00:42:11   (  69.55, 166.28) 06/05/2023   00:41:00  (  69.59, 165.28)   39.19                71
 06/07/2023   15:17:47   (  70.12, -53.43) 06/07/2023   15:18:25  (  70.13, -53.37)    2.45                38
 06/07/2023   16:08:28   ( -69.98, 114.11) 06/07/2023   16:07:56  ( -69.97, 114.04)    2.92                32
 06/10/2023   06:44:09   ( -70.81,-106.06) 06/10/2023   06:45:17  ( -70.71,-104.29)   65.86                68
 06/10/2023   07:34:41   (  70.07,  62.42) 06/10/2023   07:34:54  (  70.05,  62.39)    2.38                13
 06/10/2023   08:25:23   ( -69.98,-130.12) 06/10/2023   08:24:24  ( -69.95,-130.12)    3.06                59
 06/12/2023   23:00:51   ( -70.13,  10.79) 06/12/2023   23:01:55  ( -70.12,  10.73)    2.45                64
 06/12/2023   23:51:35   (  70.03, 178.26) 06/12/2023   23:51:22  (  70.01, 178.21)    2.87                13
 06/13/2023   00:42:08   ( -69.50, -13.65) 06/13/2023   00:40:57  ( -69.58, -14.75)   43.49                71