The one-hour special will air on Wednesday, September 11, from 12:30 to 1:30 p.m. EDT.

The program will be delivered via PBS Satellite Schedule 513 by National ITV Satellite Schedule (NISS.) NISS is a service of NETA, the National Educational Telecommunications Association, a non-profit organization serving public television and education.)

If you can receive a digital feed, here is the downlink information from Greg Tillou of NETA.
AMC 3
Ku Band, Transponder 23
Downlink frequency 12174.75 MHz
Horizontal polarity
DIGICYPHER 2 SCPC (encoded feed)

If you can receive an analog feed, here is the downlink information.
AMC3
KUband, Transponder 19
Downlink frequency 12080.00
Horizontal polarity
87 degrees West