Downloading USNO A2.0 
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1. Create a folder on your local drive
2. For each file listed, RIGHT CLICK on it in your browser then:

   Chrome & Firefox:    Select Save Link as...
   Internet Explorer:   Select Save Target as...

   Save all of the files into the folder you created in (1).
3. For each of the .CAT.zip files
   (a) Double click the zip file
   (b) Drag the .CAT file out of the zip folder
   (c) Throw the .CAT.zip file into the trash

When you are finished your USNO A2.0 folder should look have these files:

 9/24/1998   2:13           2,880  ZONE0000.ACC
 9/24/1998   2:13      23,910,768  ZONE0000.CAT
 9/24/1998   2:15           2,880  ZONE0075.ACC
 9/24/1998   2:15      86,276,232  ZONE0075.CAT
 9/20/1998  10:22           2,880  ZONE0150.ACC
 9/20/1998  10:22     246,296,364  ZONE0150.CAT
 9/20/1998   8:41           2,880  ZONE0225.ACC
 9/20/1998   8:41     383,940,000  ZONE0225.CAT
 9/20/1998   6:49           2,880  ZONE0300.ACC
 9/20/1998   6:49     457,993,524  ZONE0300.CAT
 9/20/1998   5:51           2,880  ZONE0375.ACC
 9/20/1998   5:51     485,481,948  ZONE0375.CAT
 9/20/1998   4:53           2,880  ZONE0450.ACC
 9/20/1998   4:53     489,880,236  ZONE0450.CAT
 9/20/1998   3:57           2,880  ZONE0525.ACC
 9/20/1998   3:57     533,337,552  ZONE0525.CAT
 9/24/1998   2:13           2,880  ZONE0600.ACC
 9/24/1998   2:13     537,821,028  ZONE0600.CAT
 9/20/1998   7:43           2,880  ZONE0675.ACC
 9/20/1998   7:43     451,563,264  ZONE0675.CAT
 9/20/1998   8:45           2,880  ZONE0750.ACC
 9/20/1998   8:45     259,313,868  ZONE0750.CAT
 9/20/1998  11:06           2,880  ZONE0825.ACC
 9/20/1998  11:06     240,911,568  ZONE0825.CAT
 9/20/1998  10:18           2,880  ZONE0900.ACC
 9/20/1998  10:18     246,545,064  ZONE0900.CAT
 9/20/1998   9:34           2,880  ZONE0975.ACC
 9/20/1998   9:34     257,190,756  ZONE0975.CAT
 9/20/1998   9:38           2,880  ZONE1050.ACC
 9/20/1998   9:38     250,388,400  ZONE1050.CAT
 9/20/1998  11:44           2,880  ZONE1125.ACC
 9/20/1998  11:44     240,292,752  ZONE1125.CAT
 9/20/1998  11:02           2,880  ZONE1200.ACC
 9/20/1998  11:02     241,716,960  ZONE1200.CAT
 9/20/1998  11:48           2,880  ZONE1275.ACC
 9/20/1998  11:48     225,209,376  ZONE1275.CAT
 9/20/1998   7:47           2,880  ZONE1350.ACC
 9/20/1998   7:47     227,169,384  ZONE1350.CAT
 9/20/1998   5:55           2,880  ZONE1425.ACC
 9/20/1998   5:55     190,958,580  ZONE1425.CAT
 9/20/1998   3:59           2,880  ZONE1500.ACC
 9/20/1998   3:59     123,258,960  ZONE1500.CAT
 9/20/1998   4:54           2,880  ZONE1575.ACC
 9/20/1998   4:54      71,540,304  ZONE1575.CAT
 9/20/1998   4:55           2,880  ZONE1650.ACC
 9/20/1998   4:55      34,832,736  ZONE1650.CAT
 9/20/1998   3:59           2,880  ZONE1725.ACC
 9/20/1998   3:59       9,540,948  ZONE1725.CAT