Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 6.  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)
 07/06/2025   14:28:53   (  70.09, -40.89) 07/06/2025   14:29:17  (  70.07, -40.94)    2.43                24
 07/06/2025   15:19:35   ( -70.02, 126.54) 07/06/2025   15:18:46  ( -70.01, 126.62)    3.01                49
 07/09/2025   05:55:05   ( -70.26, -92.70) 07/09/2025   05:56:17  ( -70.23, -92.47)    9.08                72
 07/09/2025   06:45:48   (  70.08,  74.89) 07/09/2025   06:45:45  (  70.07,  74.94)    2.51                 3
 07/09/2025   07:36:29   ( -69.95,-117.59) 07/09/2025   07:35:15  ( -69.96,-117.58)    1.51                74
 07/11/2025   22:11:59   ( -70.14,  23.25) 07/11/2025   22:12:47  ( -70.16,  23.31)    3.04                48
 07/11/2025   23:02:43   (  70.02,-169.26) 07/11/2025   23:02:15  (  69.99,-169.28)    3.18                28
 07/14/2025   13:38:27   (  70.96, -29.62) 07/14/2025   13:39:34  (  70.89, -27.35)   83.00                67
 07/14/2025   14:28:54   ( -70.08, 139.12) 07/14/2025   14:29:17  ( -70.07, 139.08)    1.58                23
 07/14/2025   15:19:38   (  69.97, -53.41) 07/14/2025   15:18:44  (  69.96, -53.44)    1.53                54
 07/17/2025   05:55:08   (  70.17,  87.42) 07/17/2025   05:56:15  (  70.18,  87.49)    2.66                67
 07/17/2025   06:45:49   ( -70.02,-105.03) 07/17/2025   06:45:46  ( -70.02,-105.10)    2.83                 3
 07/17/2025   07:36:28   (  69.65,  62.83) 07/17/2025   07:35:16  (  69.74,  62.15)   28.28                72
 07/19/2025   22:12:02   (  70.13,-156.74) 07/19/2025   22:12:43  (  70.11,-156.72)    1.80                41
 07/19/2025   23:02:44   ( -70.02,  10.74) 07/19/2025   23:02:13  ( -70.01,  10.78)    1.29                31