Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 21.  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)
 06/23/2023   15:17:42   (  70.07, -53.35) 06/23/2023   15:18:19  (  70.08, -53.28)    3.01                37
 06/23/2023   16:08:23   ( -69.93, 114.19) 06/23/2023   16:07:50  ( -69.92, 114.12)    2.56                33
 06/26/2023   06:44:03   ( -70.75,-105.96) 06/26/2023   06:45:12  ( -70.65,-104.20)   65.58                69
 06/26/2023   07:34:35   (  70.01,  62.51) 06/26/2023   07:34:49  (  69.99,  62.48)    2.50                14
 06/26/2023   08:25:17   ( -69.92,-130.03) 06/26/2023   08:24:19  ( -69.89,-130.03)    3.45                58
 06/28/2023   23:00:44   ( -70.12,  10.81) 06/28/2023   23:01:49  ( -70.10,  10.88)    3.40                65
 06/28/2023   23:51:27   (  69.96, 178.36) 06/28/2023   23:51:16  (  69.99, 178.37)    2.74                11
 06/29/2023   00:42:03   ( -69.55, -13.71) 06/29/2023   00:40:51  ( -69.61, -14.52)   32.44                72
 07/01/2023   15:17:37   ( -70.07, 126.66) 07/01/2023   15:18:17  ( -70.07, 126.73)    2.96                40
 07/01/2023   16:08:20   (  69.92, -65.80) 07/01/2023   16:07:45  (  69.90, -65.86)    3.08                35
 07/04/2023   06:43:58   (  70.66,  74.18) 07/04/2023   06:45:07  (  70.56,  75.70)   57.48                69
 07/04/2023   07:34:30   ( -70.03,-117.51) 07/04/2023   07:34:45  ( -70.02,-117.45)    2.69                15
 07/04/2023   08:25:13   (  69.88,  50.03) 07/04/2023   08:24:12  (  69.90,  50.03)    1.99                61