Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2015 8 20.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 08/20/2015   09:01:39   (  68.78,  43.69) 08/20/2015   09:02:23  (  68.79,  43.75)    2.57                44
 08/20/2015   09:52:20   ( -68.65,-148.81) 08/20/2015   09:51:54  ( -68.62,-148.83)    2.58                26
 08/23/2015   00:28:02   ( -69.74,  -9.18) 08/23/2015   00:29:09  ( -69.62,  -6.93)   88.01                67
 08/23/2015   01:18:29   (  68.71, 159.56) 08/23/2015   01:18:50  (  68.73, 159.56)    2.32                21
 08/23/2015   02:09:10   ( -68.57, -32.94) 08/23/2015   02:08:21  ( -68.57, -33.00)    2.64                49
 08/25/2015   16:44:38   ( -68.87, 107.81) 08/25/2015   16:45:50  ( -68.84, 107.94)    6.23                72
 08/25/2015   17:35:20   (  68.64, -84.58) 08/25/2015   17:35:18  (  68.66, -84.63)    3.17                 2
 08/25/2015   18:26:01   ( -68.51,  82.92) 08/25/2015   18:24:49  ( -68.50,  82.80)    4.93                72
 08/28/2015   09:01:28   ( -68.75,-136.25) 08/28/2015   09:02:18  ( -68.76,-136.27)    1.13                50
 08/28/2015   09:52:12   (  68.63,  31.21) 08/28/2015   09:51:45  (  68.64,  31.23)    1.04                27
 08/28/2015   10:42:38   ( -67.69,-160.27) 08/28/2015   10:41:30  ( -67.70,-162.25)   83.69                68
 08/31/2015   00:27:54   (  69.69, 170.90) 08/31/2015   00:29:01  (  69.60, 173.09)   85.19                67
 08/31/2015   01:18:20   ( -68.74, -20.47) 08/31/2015   01:18:45  ( -68.73, -20.42)    2.61                25
 08/31/2015   02:09:03   (  68.57, 147.07) 08/31/2015   02:08:13  (  68.55, 147.01)    3.48                50
 09/02/2015   16:44:29   (  68.83, -72.12) 09/02/2015   16:45:40  (  68.84, -72.02)    4.25                71
 09/02/2015   17:35:10   ( -68.69,  95.39) 09/02/2015   17:35:11  ( -68.68,  95.42)    1.25                 1
 09/02/2015   18:25:52   (  68.46, -97.01) 09/02/2015   18:24:39  (  68.50, -97.16)    7.57                73