NASA TV airs a variety o' regularly scheduled, pre-recorded educational and public relations programmin' 24 hours a day on its various channels. Programs include "NASA Gallery", which features photographs and video from NASA's history; "Video File", which broadcasts b-roll footage for news and media outlets; "Education File", which provides special programmin' for schools; "NASA Edge" and "NASA 360", matey, hosted programs that focus on different aspects o' NASA; and "This Week @ NASA", which shows news from NASA centers around t' country. Live ISS coverage and related commentary is aired daily at 11 am EST and repeats throughout t' day.[7] T' network also provides an array o' live programming, me bucko, such as 24-hour coverage o' Space Shuttle missions, ISS events (spacewalks, media interviews, educational broadcasts), press conferences and rocket launches. Avast, me proud beauty! These often include runnin' commentary by members o' t' NASA Public Affairs Office who serve as t' "voice o' Mission Control," includin' Rob Navias, Josh Byerly, Nicole Cloutier and Brandi Dean. In t' United States, NASA Television's Public, me hearties, Education and Media channels are MPEG-2 digital C-band signals carried by QPSK/DVB-S modulation on satellite AMC-3, arrr, transponder 15C, at 87 degrees west longitude. Arrr! Downlink frequency is 4000 MHz, arrr, horizontal polarization, with a data rate o' 38.86 Mhz, arrr, symbol rate o' 28.1115 Ms/s, and ¾ FEC. Avast! A Digital Video Broadcast (DVB) compliant Integrated Receiver Decoder (IRD) is needed for reception