Modem for the land mobile satellite channel

This paper describes a modem which has been developed and implemented using a digital signal processor (DSP) for a land mobile satellite demonstration system. The requirements of this digital modem were determined by the characteristics of the land mobile satellite channel. This paper discusses the algorithms which implement the differentiated phase shift keying (DPSK) demodulator. An algorithm is included which estimates symbol timing independent of carrier phase without the use of a square-law nonlinearity

What I believe about leadership and education : a reflective essay

What I believe about leadership and education can be partly explained in the following words. Among the strongest of critical elements included in exemplary leadership in education are building relationships, hiring great teachers and developing the ones you have, maintaining high expectations, and creating a positive climate and culture

Turning Off the Lights: Automating SkySat Mission Operations

A common goal for satellite operations is to achieve a level of automation that minimizes human interaction, especially as constellation sizes increase. Planet’s SkySat fleet is a constellation of high resolution Earth imaging smallsats that has grown from three to fifteen satellites in three years. This rapid expansion, along with Planet’s goal of improving operational reliability, has necessitated automating operations to reduce manual effort to maintain the health and safety fleet. To address the growing amount of work required for anomaly triage, systems were created for automated anomaly response. These systems have removed the need to actively monitor satellite health and safety. Instead, operators rely on interrupt-driven alerts to inform them of an anomaly. With the goal of further decoupling fleet size from operator effort, the mission operations team is working to automate routine maintenance tasks. As a result, the number of person-hours needed to actively operate the fleet has seen a three-fold reduction per week while enabling a five-fold increase in on-orbit assets. The systems developed have enabled an operational posture that removes the need for 24/7 staffing at a dedicated operations center

Prospectus, February 2, 1977

APATHY REIGNS: FOUR SEEK SIX POSTS IN FRIDAY\u27S ELECTION; PC news in brief: Intramurals volleyball, First Aid cards are in, Calendar errs, Voter registration info given; \u27Referendum crucial\u27: PC faces deficit: Neal; Producer Rick Orr visits PC this week; Editorial: Activity fees found discriminatory; Letters to the editor: Party thanks, Lots of Money; Staff editorial: Check \u27no\u27 no 1040\u27s; Forums set for spring; Parkland divided on amnesty question; Nettnin is VA coordinator, replacing Joe O\u27Daniel; New anti-crime group offers reward; Snowed over but not snowed in!; PC student starts Tel-a-quest; Lacking in days: February has the groundhog; \u27Beads\u27 is featured by Somedancers; Referendum polling places listed; 226 treated before end of month: PC Dental Clinic offers Head Start for teeth of local children; 2 new listings: Music Courses offered; Violinist Fried plays at Krannert; VA interprets changes; Somedancers Inconcert at Paxton, Saturday; Practicum new for art students this semester; Classifieds; Cobras defeat Danville; \u27Good\u27 moves into first place; Men\u27s Intramural Basketball Schedule; Kankakee game canceled: Women cagers undefeated so far; Co-Rec Volleyball Tuesdays; \u27Good competition\u27: Indoor track meets at UI; Kathy Kaler named to All-American teamhttps://spark.parkland.edu/prospectus_1977/1029/thumbnail.jp

Prospectus, January 25, 1977

REFERENDUM FEB. 15; Voting hours extended, 7-7: Board plans tax vote; Vocational-Technical Programs Topic Of Report; Student Representative Sworn In; Special Election Resolution Amended; President\u27s Report; Three Career Programs Added; Personnel Report Adopted; PC mews in brief: Calendar errs, Voter registration info given, Cancelling Classes Due to Snow; Letters to the editor: \u27Handicapped\u27 guidelines set, Talk to us..., Parent Power!; Editorial: Bookstore must change; Stu-Go begins year with resginations; Ice Capades tickets; Three fires strike Champaign; fifth column: No wonder no one goes to movies; Remember?: Fall sem. review; Diane Alexander no newcomer to student politics; Students critical of TV coverage; Break at Parkland; Sociological Association meets; Campustown may get a 2nd Chance after fire; Media Sceen: Fifth network should start in Fall; Rantoul\u27s Breezy 26 year tattooer: \u27Roses, butterflies\u27 most popular; Classifieds; Women Cagers meet Danville tonight; Intramurals start Jan. 26; Madlock signs at Gery and Al\u27s; Track starts Thursday; Olney beats Cobras in \u27thriller\u27; Cobras solidly defeat Lincoln Land last Tuesday; Baseball your game?https://spark.parkland.edu/prospectus_1977/1030/thumbnail.jp

Magnetospheric MultiScale (MMS) System Manager

The Magnetospheric MultiScale (MMS) mission is an ambitious NASA space science mission in which 4 spacecraft are flown in tight formation about a highly elliptical orbit. Each spacecraft has multiple instruments that measure particle and field compositions in the Earths magnetosphere. By controlling the members relative motion, MMS can distinguish temporal and spatial fluctuations in a way that a single spacecraft cannot.To achieve this control, 2 sets of four maneuvers, distributed evenly across the spacecraft must be performed approximately every 14 days. Performing a single maneuver on an individual spacecraft is usually labor intensive and the complexity becomes clearly increases with four. As a result, the MMS flight dynamics team turned to the System Manager to put the routine or error-prone under machine control freeing the analysts for activities that require human judgment.The System Manager is an expert system that is capable of handling operations activities associated with performing MMS maneuvers. As an expert system, it can work off a known schedule, launching jobs based on a one-time occurrence or on a set reoccurring schedule. It is also able to detect situational changes and use event-driven programming to change schedules, adapt activities, or call for help

Analysis of ocean power extraction capabilites of a rotary wave energy conversion system

Gemstone Team WAVES (Water and Versatile Energy Systems)In recent years, there has been a shift towards renewable energy sources to help alleviate the dependence on fossil fuels. Many industries have started to investigate wind, solar, and other alternative energy sources. Our research aimed to provide additional insight into the field of wave energy as a component of a comprehensive energy solution. We selected a unique wave energy converter design and analyzed potential modifications that could improve its performance. After developing design modifications, we constructed and tested a prototype of a Rotary Wave Energy Collector (R-WEC). We tested the rotor under two mooring configurations and collected data on the relationship between power output and wavelength. We also analyzed the rotor's performance under single and multiple frequency wave environments. In addition, we investigated the implementation of a full-scale device through a study of three coastal regions in the mid-Atlantic U.S. area. This research showed that our R-WEC design could be implemented in shallow water, single frequency wave environments to generate usable power