“Special Master reports are now being posted on the Supreme Court’s Web site. On the ‘Docket’ page of the Web site you will find a link titled ‘Special Master Reports.’ The Court will add reports as they are issued in the future. In addition, the Court plans to post past reports as well.
Please contact the Public Information Office (202-479-3211) if you have any questions.”
As Lyle Denniston explains at SCOTUSBlog, the court appoints special masters to conduct preliminary reviews of original cases that the court allows to be filed and to make recommendations for deciding those cases.