KPXJ

Key takeaways

KPXJ belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect KPXJ to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of KPXJ from memory before moving on to harder problems.

Reference excerpt

KPXJ (channel 21) is a television station licensed to Minden, Louisiana, United States, serving the Shreveport area and the Ark-La-Tex region as an affiliate of The CW. The station is owned by locally based KTBS, LLC, alongside ABC affiliate KTBS-TV (channel 3). The two stations share studios on East Kings Highway on the eastern side of Shreveport; KPXJ's transmitter is located near St. Johns Baptist Church Road (southeast of Mooringsport and Caddo Lake) in rural northern Caddo Parish.

History

Early history; as a Pax TV owned-and-operated station The UHF channel 21 allocation was contested between multiple groups that competed for approval by the Federal Communications Commission (FCC) to be the holder of the construction permit to build and license to operate a new television station on the third commercial UHF allocation to be assigned to the Shreveport–Texarkana market (assigned to the Shreveport suburb of Minden, Louisiana). Among the prospective applicants were John E. Powley (who applied for the license on January 16, 1996), Tucson, Arizona–based Northwest Television Inc. (owned by company president William L. Yde III, president, who applied for the license on January 18, 1996) and five parties who each applied for individual applications on April 4 and 5, 1996: Los Angeles–based Venture Technologies Group LLC (majority owned by Lawrence Rogow, who also served as the group's president), Little Rock–based Kaleidoscope Partners (forerunner company to Equity Broadcasting), Washington, D.C.–based WinStar Broadcasting Corp. (owned by Stuart B. Rekant), Wichita, Kansas–based entrepreneur Marcia T. Turner, Columbia, South Carolina–based Universal Media (majority owned by company president Murray Michaels) and Shreveport-based Word of Life Ministries Inc. On December 19, 1997, West Palm Beach, Florida–based Paxson Communications (now Ion Media Networks)—which was preparing to launch Pax TV, a family-oriented broadcast television network, that tapped Paxson Communications-owned affiliate stations of the Infomall TV Network (inTV), and newly launched and purchased stations to serve as the network's initial affiliates—reached a settlement with the other applicants to acquire the construction permit to operate UHF channel 21, among seven it settled to acquire for an average cost of $4.95 million. On April 14, 1998, The FCC approved the purchase of the channel 21 permit to Paxson and dismissed the applications of the seven competing applicants. The station first signed on the air on August 31, 1998, as WPXO (in reference to its network affiliation and original corporate parent). Channel 21 originally operated as a charter owned-and-operated station of Pax TV (now general entertainment network Ion Television), which launched on the date of the station's launch. On January 8, 1999, the station changed its call letters to KPXJ; at that time, KTBS, LLC, the Shreveport-based owner of local ABC affiliate KTBS-TV (channel 3), began to operate the station under a joint sales agreement (JSA) with Paxson.

As a UPN affiliate On June 17, 2003, Paxson Communications announced it would sell KPXJ to KTBS, LLC for $10 million; the FCC rejected the application as agency ownership rules prohibited common ownership of two television stations in a single market if there are fewer than eight independent full-power station owners. As such, Paxson reached an agreement to sell the KPXJ license to Minden Television Company LLC (owned by Lauren Wray Ostendorff, daughter of Edwin N. Wray Jr., part-owner of KTBS), an indirect subsidiary of Wray Properties Trust, for $10 million. On September 24, 2003, KPXJ took over as the Shreveport-area affiliate of UPN, assuming rights to the network's programming from KSHV-TV (channel 45), which been affiliated with UPN since August 28, 1995 (originally as a primary affiliation until January 2001, before shifting to secondary status to the station's WB affiliation); as a result, KSHV became an exclusive affiliate of The WB. After affiliating with UPN, KPXJ—which, accordingly, changed its branding to "UPN 21"—adopted a general entertainment format typical of UPN stations at the time, initially carrying a mix of first-run syndicated talk, game and court shows, recent off-network sitcoms and drama series, syndicated cartoons and educational children's programs, religious programs, and some sports programming. Channel 21 continued to carry Pax TV programming on a secondary basis until April 2004; it also continued to air programming from The Worship Network (originally via the Pax TV network feed, then via the direct network feed from 2007 onward) during the overnight hours until early 2010, when Pax successor Ion Television ceased carrying the network as a subchannel service on its owned-and-operated stations. On May 1, 2004, KTBS-TV parent KTBS, LLC re-assumed operational responsibilities for channel 21 under a local marketing agreement with Minden Television.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with KPXJ

Start with the simplest possible case. Write down what KPXJ claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to KPXJ before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about KPXJ ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of KPXJ

In research: KPXJ appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses KPXJ in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: KPXJ is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1998 establishments in Louisiana, ATSC 3.0 television stations, Antenna TV affiliates, so understanding it makes those chapters shorter.
In everyday life: Look for KPXJ outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

How to study KPXJ in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what KPXJ means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain KPXJ out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is KPXJ in simple terms?

KPXJ (channel 21) is a television station licensed to Minden, Louisiana, United States, serving the Shreveport area and the Ark-La-Tex region as an affiliate of The CW. The station is owned by locally based KTBS, LLC, alongside ABC affiliate KTBS-TV (channel 3).

Why does KPXJ matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study KPXJ?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on KPXJ.