Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 5 16.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/17/2021   06:57:59   (  70.12,  71.89) 05/17/2021   06:57:13  (  70.11,  71.87)    0.68                46
 05/17/2021   07:47:29   ( -70.00,-120.63) 05/17/2021   07:47:55  ( -70.02,-120.67)    2.34                26
 05/19/2021   22:24:49   ( -70.97,  21.40) 05/19/2021   22:23:42  ( -71.05,  18.82)   93.69                67
 05/19/2021   23:14:31   (  70.05,-172.33) 05/19/2021   23:14:09  (  70.05,-172.26)    2.62                22
 05/20/2021   00:04:01   ( -69.94,  -4.85) 05/20/2021   00:04:51  ( -69.95,  -4.80)    2.32                50
 05/22/2021   14:41:35   ( -70.14, 136.03) 05/22/2021   14:40:22  ( -70.14, 136.05)    0.82                73
 05/22/2021   15:31:02   (  70.03, -56.47) 05/22/2021   15:31:06  (  70.04, -56.48)    0.41                 4
 05/22/2021   16:20:34   ( -69.82, 110.86) 05/22/2021   16:21:46  ( -69.83, 111.15)   11.29                72
 05/25/2021   06:58:06   ( -70.12,-108.11) 05/25/2021   06:57:19  ( -70.13,-108.17)    2.44                47
 05/25/2021   07:47:33   (  70.01,  59.38) 05/25/2021   07:48:03  (  70.03,  59.30)    3.39                30
 05/27/2021   22:24:54   (  70.86,-158.78) 05/27/2021   22:23:46  (  70.91,-160.98)   80.37                68
 05/27/2021   23:14:37   ( -70.04,   7.65) 05/27/2021   23:14:14  ( -70.07,   7.69)    3.38                23
 05/28/2021   00:04:03   (  69.99, 175.22) 05/28/2021   00:04:58  (  69.97, 175.15)    3.13                55
 05/30/2021   14:41:38   (  70.12, -44.00) 05/30/2021   14:40:28  (  70.12, -43.94)    2.24                70
 05/30/2021   15:31:08   ( -70.02, 123.49) 05/30/2021   15:31:10  ( -70.01, 123.54)    1.88                 2
 05/30/2021   16:20:39   (  69.68, -69.33) 05/30/2021   16:21:50  (  69.70, -68.68)   24.92                71