№ lp_2_3_10730
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The document presents a study on initial orbit determination and correlation methods for space debris, using very short arc angle data obtained through ground-based optical telescopes, focusing on the performance of several telescopes in China and their application to cataloging space debris.
Year: 2021
Region / City: Wuhan, Changchun, Shanghai, Zibo, Xi’an, China
Topic: Space debris, optical telescopes, orbit determination
Document Type: Research article
Organization / Institution: Shandong University of Technology, Wuhan University, Chinese Academy of Sciences
Author: Lei Xiangxu, Xia Shengfu, Wang Xiaozhen, Li Zhenwei, Sang Jizhang, Luo Hao
Target Audience: Researchers and professionals in space debris monitoring, space surveillance
Effective Period: N/A
Approval Date: N/A
Date of Modifications: N/A
Price: 8 / 10 USD
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Space Telescopes: Hubble, Spitzer, and James Webb Missions Overview
Year: 1990–planned launch of James Webb
Region / Location: Space / Earth orbit and Sun orbit
Subject: Astronomy / Space Observation
Document Type: Educational worksheet / Study guide
Organization: Not specified
Author: Not specified
Target Audience: Students
Key Telescopes: Hubble Space Telescope, Spitzer Space Telescope, James Webb Space Telescope
Wavelengths Observed: Visible light, radio waves, microwaves, ultraviolet, X-rays, gamma rays, infrared
Primary Objectives: Observing distant galaxies, penetrating dust clouds, studying cold or old objects
Mirror Sizes: Hubble 2.4 m, James Webb 50 times Spitzer, 7 times Hubble
Launch Dates: Hubble 1990, Spitzer 2003
Repair History: Hubble repaired 1993
Orbit Details: Hubble Earth orbit, Spitzer Sun orbit, James Webb Sun orbit
Servicing: Hubble yes, James Webb no
Student Exploration: Triangle Angle Sum
Note: Year
Subject: Mathematics
Document Type: Educational resource
Target Audience: Students
Draft Minutes - Angle Community Council Meeting, Wednesday 3rd December 2025
Year: 2025
Region / City: Angle, Pembrokeshire
Topic: Community council meeting
Document Type: Meeting minutes
Organization / Institution: Angle Community Council
Author: Cllrs Ward, Williams, Stuckey, Lamport-Taylor, CClr Alderman, Mrs J Rowlands
Target Audience: Community members, councilors, public officials
Period of validity: 3rd December 2025 - 7th January 2026
Approval Date: 3rd December 2025
Date of Changes: N/A
Supplemental Table 4. Systematic Review Lateral Center Edge Angle Patient Reported Outcome Measure Associations
Year: 2019
Region / City: Not specified
Topic: Patient-reported outcome measures in hip disorders
Document Type: Systematic review
Author: Beck et al.
Target Audience: Healthcare professionals, researchers in orthopedics
Period of Action: Not specified
Approval Date: Not specified
Date of Changes: Not specified
Geometry: Constructing Perpendicular Bisectors, Medians, Altitudes, and Angle Bisectors
Year: 2026
Subject: Geometry
Document type: Educational worksheet
Target audience: Students
Instructions page references: 266-268
Content focus: Triangle constructions and properties
Skills developed: Geometric reasoning and construction
Safe Work Procedure for Using an Angle Grinder
Year: 2026
Region / City: Not specified
Topic: Workplace safety / Machinery operation
Document Type: Safety procedure
Organization / Institution: Not specified
Author: Not specified
Target Audience: Trained personnel operating angle grinders
Effective Period: Until further notice
Approval Date: Not specified
Revision Date: Not specified
Equipment Covered: Battery, pneumatic, and electrically powered angle grinders
Safety Measures: Personal protective equipment, pre-operational checks, operational guidelines, task completion procedures
3GPP RAN3 Discussion on UL Angle of Arrival Assistance Information Encoding and Signalling for Positioning Enhancements, August 2021
Year: 2021
Month: August
Event: 3GPP TSG-RAN WG3 Meeting #113-e
Dates: 16–26 August 2021
Agenda Item: 19.2.1
Document ID: R3-214309
Organization: 3GPP
Working Group: TSG-RAN WG3
Source: Ericsson (moderator)
Co-sources Mentioned: Ericsson, Huawei, Nokia, Nokia Shanghai Bell, CATT, ZTE, Qualcomm
Topic: 5G NR positioning enhancements and uplink Angle of Arrival signalling
Technical Area: NRPPa protocol and positioning measurements
Related Specification: TS 38.455
Related Document: R3-214297; R3-214287; R3-213851
Document Type: Technical meeting contribution
Purpose: Discussion
Technical Scope: UL Angle of Arrival assistance information, expected azimuth and zenith AoA values, signalling in NRPPA measurement messages
Target Audience: 3GPP RAN3 delegates and technical contributors
Status: Discussion input and chair’s notes proposals
Geometry Angle Relationship Test Review
Year: 2026
Subject: Geometry
Document Type: Test Review
Target Audience: High school students
Topics Covered: Angles, Angle Relationships, Triangle Properties
Format: Educational handout
Institution: High School Mathematics Department
Context: Educational handout containing exercises and explanations for reviewing angle relationships in geometry.
[FS_ULBC] Feasible bitrates for the NTN-TDL-C channel model with 10-degree elevation angle
Year: 2026
Region / city: Goa, India
Topic: Feasible bitrates, NTN-TDL-C channel model
Document type: Technical paper
Organization: Qualcomm Incorporated, Xiaomi
Author: Qualcomm Incorporated
Target audience: SA4 working group members, 3GPP participants
Effective period: February 9-13, 2026
Approval date: Not provided
Date of changes: Not provided
Angle Relationships and Segment Problems with Diagrams
Year: 2026
Region / City: Not specified
Topic: Geometry / Angles and Segments
Document Type: Educational Exercise
Author: Not specified
Target Audience: Students learning geometry
Related Concepts: Corresponding angles, Alternate interior angles, Alternate exterior angles, Consecutive interior angles, Vertical angles, Parallel and perpendicular segments, Skew segments, Two-column proofs
Problem Types: Identification, Calculation, Proof
YX-WA112-SMAF6.57 - 9.99 GHz Waveguide Coaxial Adapter Right Angle
Year: Not specified
Region / City: Not specified
Topic: Microwave communication, Radar systems, Test and measurement
Document type: Product datasheet
Organization / Institution: YERSON
Author: Not specified
Target audience: Engineers, technicians
Validity period: Not specified
Approval date: Not specified
Amendment date: Not specified
Topics: ground-based telescopes angle