. "There are three types of viewing Nielsen regularly measures and reports. Live viewing, live plus same day DVR viewing (these are the most commonly reported numbers) and live viewing plus seven days of DVR viewing. The cut-off time for Live+SD (live plus same day viewing) is 3:00AM local time when meters transmit daily viewing to Nielsen for processing. Nielsen says Live+7 is \"incremental viewing that takes place during the 7 days following a telecast.\" In addition to their traditional program ratings Nielsen now also offers commercial minute ratings which are an average rating for all national commercial minutes during a program. They offer this commercial rating for all ratings streams. Starting with the 2007-2008 season most ad buys are based on the commercial minute ratings from the live+three day DVR rating stream. This combination has become known as the C3 rating, short for commercial and three day. For Terminator on Fridays, the ratings for DVR viewing has been significantly higher. According to James Hibberd of the Hollywood Reporter, the Live+7 data for the mid-season premiere episode gained a 36% increase. However, Robert Seidman of TVbytheNumbers says, \"percentage based increases are misleading because the shows with relatively few viewers overall, but still relatively good DVR viewing numbers show the highest percentage increases.\" Also, since advertising is bought and sold on C3 data (measurement of how many are watching the commercials), TVbytheNumbers says that, \"So far as we can tell DVR viewing doesn\u2019t meaningfully add to a networks ability to make money, and more people watching shows via DVR isn\u2019t good news for the networks...most people using DVRs usually avoid commercials...the C3 data doesn't differ significantly from the live viewing, and that the relative performance of shows using the live plus same day DVR viewing is a good proxy for predicting success or failure.\" On February 17, 2009 a blog post on the official FOX site told viewers how they can help boost attention and ratings. . Some highlights include: \n* DVR it and watch it again (and again) within THREE DAYS. \n* Watch it again on FOX.com. \n* Make Terminator #1 in the iTunes TV store as well as Amazon.com. \n* Email friends, family, coworkers, reporters, bloggers, pets, etc. and explain to them WHY this show matters to you. Read the full list. For Terminator: The Sarah Connor Chronicles to be renewed, the C3 data has to be good (determined by the network and advertisers). This means if you want this show to succeed, following the tips above like watching the show live or on your DVR within 3 days, will help the C3 ratings."@en . . . "Broadcast ratings"@en . . "There are three types of viewing Nielsen regularly measures and reports. Live viewing, live plus same day DVR viewing (these are the most commonly reported numbers) and live viewing plus seven days of DVR viewing. The cut-off time for Live+SD (live plus same day viewing) is 3:00AM local time when meters transmit daily viewing to Nielsen for processing. Nielsen says Live+7 is \"incremental viewing that takes place during the 7 days following a telecast.\" On February 17, 2009 a blog post on the official FOX site told viewers how they can help boost attention and ratings. . Some highlights include:"@en . . .