TA

(redirected from Antenna Temperature)
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AcronymDefinition
TATeaching Assistant
TATrans Am (Pontiac automobile model)
TATechnical Assistance
TAAmbient Temperature
TATurn Around
TATime Attack (gaming)
TAThanks Again
TATravel Agent (Agency)
TATechnology Assessment
TATerritorial Army (UK)
TATank (aircraft designed by Kurt Tank & built by Focke-Wulf Flugzeugbau GmbH)
TATransition(al) Architecture
TATantalum
TATuition Assistance
TATransit Authority
TATransfer Agent (financial industry)
TATaunton (postcode, United Kingdom)
TATel Aviv
TATechnical Analysis
TATo Above
TATransactional Analysis (psychology)
TATransmit(ter) Address
TATarget Audience
TATrade Association
TATotal Area (geometry)
TATarget Area
TATotal Annihilation (game by Cavedog Entertainment)
TATori Amos (singer)
TATechnical Advisory (computer security bulletin)
TATask Analysis
TATechnical Adviser
TATrading As (similar to DBA, doing business as)
TATravel Allowance (various organizations)
TATraining Area
TATechnical Assessment
TATechnical Architecture
TATrend Analysis
TATarget Acquisition
TATraffic Accident
TATraffic Announcement
TATechnical Area
TATaxing Authority
TATravel Authorization
TATitus Andronicus
TATiger Army (band)
TATeachers Assistant
TATarget Address
TATamper Alarm
TATable of Allowance
TATarget Analysis
TATeam Anna (political group)
TATemporarily Absent
TATechnical Arrangement
TATraffic Analysis
TATechnical Audit
TATelecommunications Authority (various locations)
TATechnical Advance
TATechnical Authority
TATibialis Anterior
TATotal Average
TATechnical Assist (computer security bulletin)
TAAntenna Temperature
TATechnology Administration
TATolerance Analysis (mechanical engineering)
TATeaming Agreement (various organizations)
TATechnology Alliance (various locations)
TATonsillectomy and Adenoidectomy (medical procedure)
TATotal Alkalinity (water chemistry)
TATeam Arena (Quake 3 expansion pack)
TATechnical Associates (Canoga Park, CA)
TATartan Army (Supporters of Scotland's national football team)
TATaxpayer Advocate
TATraining Aid
TATank Army (CIS)
TATom Atkins (Actor)
TATentative Agreement
TATriacetin
TATransition Altitude (aviation)
TATiming Advance
TAUnited Kingdom to United States (routing destination; US Navy)
TATactical Airlift
TATricuspid Atresia (congenital heart defect)
TATherapeutic Area
TATeacher Advisor
TATrey Anastasio (Phish band member)
TATest Article
TATemporal Artery
TATime & Attendance
TATrading Assistant (eBay)
TATechnical Acceptance
TATextile and Apparel
TATravel Assistance
TAType of Assistance
TATime Alignment (audio synchronization)
TATemperature Alarm
TAThreat Analysis (information operations/computer network defense)
TATraining Agency
TATetris Attack (video game)
TATraffic Advisory
TATenancy Agreement
TATeacher Assessment (education)
TATest Access
TATravel Advance
TATrade Assistant
TATension Arterial (Spanish: Blood Pressure)
TATemperature Ambient
TATugas Akhir (Indonesian: Final Assignment)
TATerrain Analysis
TATree Algorithm
TATask Agreement (various organizations)
TATax Amortization
TATaranto, Puglia (Italian province)
TATotal Army
TATerminal Adaptor
TATheater Army
TATherapeutic Abortion
TATechnical Assembly
TATotal Attempts (volleyball statistic)
TATexture Analyser
TATasking Authority
TAThanks Awfully
TATerrain Avoidance
TATraditional Authorities
TATrusted Agent
TATerritorial Authority (New Zealand)
TATransamerica Corporation
TATravel Approval
TATowed Array
TATeam AnandTech (distributed processing team)
TATotal Audience
TATest Activity
TATubular Adenoma
TATrack Analysis
TATrick Attack (game)
TATest Alert (Hekimian)
TAThroughput Accounting
TATransverse Anastomosis (surgery)
TATransmission Analysis
TATransverse Acoustic (Raman scaterring)
TATerminal Address (computing)
TATransducer Assembly
TAToyota Atlantic (auto racing)
TATruckstops of America
TAThermal Array
TATraining Analyst
TATraining Agent
TATraveling Allowance
TATelescope Assembly
TAThermal Asperity
TAThreat Avoidance
TATangerine Army (gaming group)
TATravelCenters of America, Inc.
TATransient Alert
TATest Authority
TATransmitter Assembly
TATwisted Animation (band)
TAThink Attack
TATropical Air Mass (weather)
TAToei Animation Co. Ltd
TATiming Algorithm
TATest Authorization
TATransportation Approval
TATexAgs (Texas A&M sports forum)
TATitulaire Académique (French: Academic Holder)
TATime Accelerator (Quake 2 gaming)
TAThreat Axis
TATeresian Association
TATemasek Academy
TATerritory Assignment
TATerminates Above (mechanical services design)
TATaca International Airlines, El Salvador (IATA airline code)
TATask Authorizations
TATransfer Aisle
TATrainee Agent
TATaure en'Arvandor (gaming)
TATransportability Approval
TATiberian Adventure (game)
TATracked Aggression (music disks)
TATeaching/Teacher's Aide
TATRADOC Airlift Committee
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References in periodicals archive ?
It can be seen that from Equation (2), the antenna temperature distribution is the weighted average of the product of the target radiation temperature and the antenna pattern, which serves as the smoothing method.
Step 5: To determine the location coordinates of the antenna at the next moment [t.sub.k+i] = [t.sub.k] + i[DELTA]t, and repeat the calculation from Step (2) to Step (4), so as to get the curve of the antenna temperature during the intersection of the radiometer and the target.
The receiver is operating at 5 GHz and its antenna is elevated 5 degrees, so we can determine that the antenna temperature is 30 K.
TABLE II PLANETARY DATA Venus Jupiter S (x [10.sup.-26]) 51.7 80.7 r ([double prime]) 10 21 The aperture efficiency and antenna temperature for a point source are related by the expression[10]
In this equation, k = 1.38 [multiplied by] [10.sup.-23]J[K.sup.-1] is Boltzmann's constant, [A.sub.g] is the geometrical area of the aperture ([m.sup.2]), S is the flux density of the source (W[m.sup.-2] H[z.sup.-1]), [T.sub.a] is the measured increase in antenna temperature due to the source (K) and [[Eta].sub.a] is the aperture efficiency, inclusive of the effects of the radome, blocking and illumination taper.
When the imaging system detects objects within a short range, the antenna temperature contrast between the object and the background is expressed as:
According to Equation 7, the sensitivity improvement due to the use of a low noise TTA is strongly dependent on the antenna temperature and, therefore, on frequency and environment.[1] Figure 5 shows the sensitivity improvement plotted as a function of the reduction in noise figure through the use of a TTA with the effective antenna temperature as a parameter (assuming that the noise figure of the improved system is 1.5 dB) corresponding to an effective noise temperature of 120 K.
The natural sources include lightning, celestial radio sources, atmospheric sources and thermal radiation from the ground and other physical structures.a The effective antenna temperature also depends on the antenna pattern.
Three sources of apparent brightness temperature play an important role in determining the PMMW antenna temperature that will be observed by a low-altitude, earth terrain sensor.
However, Ch values can be obtained directly by measuring the ratio of antenna temperature differences.
By using the radiometer not to measure directly the antenna temperature, but rather the difference between this and some known reference temperature, the sensitivity of the measurement to gain and noise temperature instabilities is greatly reduced.
This equivalent blackbody temperature is referred to as the antenna temperature ([T.sub.a]).