User contributions
(Latest | Earliest) View (newer 250 | older 250) (20 | 50 | 100 | 250 | 500)
- 02:07, 22 November 2013 (diff | hist) . . (0) . . N File:PictureAtt.png (top)
- 02:06, 22 November 2013 (diff | hist) . . (0) . . N File:PicturePPM.png (top)
- 02:05, 22 November 2013 (diff | hist) . . (0) . . N File:PictureFieldFox.png (top)
- 02:04, 22 November 2013 (diff | hist) . . (+844) . . N Instruments and Components (Created page with "Here is a list of ideal field instruments and HF components for maintenance of wind profilers: {| |- | 200px || Network and spectrum analyzer Fie...") (top)
- 02:04, 22 November 2013 (diff | hist) . . (+482) . . N Typical Losses of HF Components (Created page with "{| ! align="left"|Component description !! align="left"|Loss |- | Connectors || 0.1 - 0.2 dB |- | irculator / Limiter || 0.3 0.5 dB |- | Switches || 0.2 - 0.3 dB |- | Cable RG...") (top)
- 02:03, 22 November 2013 (diff | hist) . . (+142) . . N Annexe (Created page with "Vaisala Configuration File Typical Losses of HF Components Instruments and Components Back to RWP Maintenance in CWINDE") (top)
- 02:03, 22 November 2013 (diff | hist) . . (+2,617) . . N Spare Parts Policy (Created page with "Spare parts can be split into two categories: 1) Consumable parts 2) Parts to be replaced less often or following exceptional events. For both Vaisala and Degréane wind ...") (top)
- 02:02, 22 November 2013 (diff | hist) . . (+843) . . N D3: S-parameter (S11) of antenna (Created page with "== Purpose == This procedure allows to measure the reflectivity of each antenna. A high reflectivity can be due to a broken antenna or to a bad match. Check connectors and ca...") (top)
- 02:01, 22 November 2013 (diff | hist) . . (0) . . N File:PicturePowerDegreane.png (top)
- 02:00, 22 November 2013 (diff | hist) . . (+1,069) . . N D2: Emitted power and pulse width (Created page with "== Purpose == This procedure allows to verify the peak power emitted by the amplifier. == Remarks == Attention, this procedure includes measurements of high power radiatio...") (top)
- 01:59, 22 November 2013 (diff | hist) . . (0) . . N File:PictureAmpInputDegreane.png (top)
- 01:59, 22 November 2013 (diff | hist) . . (+1,316) . . N D1: Losses in Tx chain (Created page with "== Purpose == This procedure allows to determine losses in the transmit chain at low power. It helps to identify eventually broken components in the transmit chain (e.g. circ...") (top)
- 01:58, 22 November 2013 (diff | hist) . . (0) . . N File:PictureVSWRVaisala.png (top)
- 01:58, 22 November 2013 (diff | hist) . . (+924) . . N V6: Standing wave ratio (Created page with "== Purpose == This procedure allows to determine the amount of energy that is reflected directly by the antenna due to non-perfect match. == Remarks == The VSWR (S11) para...") (top)
- 01:57, 22 November 2013 (diff | hist) . . (0) . . N File:SchemaRangeCalibVaisala.png (top)
- 01:56, 22 November 2013 (diff | hist) . . (+1,127) . . N V5: Range calibration (Created page with "== Purpose == This procedure is necessary to calibrate the signal delay to range attribution. == Remarks == Note on the equipment to be used: starting with the power level...") (top)
- 01:55, 22 November 2013 (diff | hist) . . (+5,937) . . N Vaisala Configuration File (Created page with " Vaisala Configuration File // Configuration Editor file for: // Two Winds, 1290 MHz, no RASS [GLOBAL] { } [DWELLMODES] { MODENAME = WA { iAddtoDir = 0; ...") (top)
- 01:54, 22 November 2013 (diff | hist) . . (0) . . N File:PicturePowerVaisala.png (top)
- 01:53, 22 November 2013 (diff | hist) . . (0) . . N File:SchemaPowerVaisala.png (top)
- 01:53, 22 November 2013 (diff | hist) . . (+421) . . V4: Emitted power and pulse width (top)
- 01:51, 22 November 2013 (diff | hist) . . (+1,032) . . N V4: Emitted power and pulse width (Created page with "== Purpose == Check of the control signals and of the emitted pulse of the Modulator, IF and Interface unit (MII). == Remarks == The procedure can also be found in the Fac...")
- 01:50, 22 November 2013 (diff | hist) . . (0) . . N File:SchemaLogicTimingVaisala.png (top)
- 01:50, 22 November 2013 (diff | hist) . . (+1,032) . . N V3: Radar signals (Created page with "== Purpose == Check of the control signals and of the emitted pulse of the Modulator, IF and Interface unit (MII). == Remarks == The procedure can also be found in the Fac...") (top)
- 01:49, 22 November 2013 (diff | hist) . . (+567) . . N V2: Local oscillator signal (Created page with "== Purpose == The signal of the local oscillator is used to convert the signal from low (intermediate frequency IF) to high (radio frequency RF) frequencies. It has to be sta...") (top)
- 01:48, 22 November 2013 (diff | hist) . . (+926) . . N V1: Noise level and electromagnetic perturbations (Created page with "== Purpose == This procedure allows to determine the level of the noise, that is generated inside the reception chain. The noise level should be low and constant. An increasin...") (top)
- 01:48, 22 November 2013 (diff | hist) . . (+708) . . N Maintenance Procedures (Created page with "The following measurements are standard measurements for a wind radar. Good practice is to perform these measurements in regular intervals, always in exactly the same way to h...") (top)
- 01:47, 22 November 2013 (diff | hist) . . (+3,160) . . N Maintenance Items (Created page with "This section gives an incomprehensive list of items to be checked on regular intervals, in order to maintain the wind profiler in good state and to avoid system failures. The ...") (top)
- 01:46, 22 November 2013 (diff | hist) . . (+1,031) . . N E-WINPROF (Created page with "[http://www.eucos.net/nn_133388/EN/Home/networks/winprof/winprof__node.html?__nnn=true E-WINPROF] is a programme of [http://www.eucos.net/cln_031/EN/Home/eucos__node.html?__nn...") (top)
- 01:45, 22 November 2013 (diff | hist) . . (+126) . . N RWP Maintenance in CWINDE (Created page with "E-WINPROF Maintenance Items Spare Parts Policy Maintenance Procedures Problems & Solutions Annexe") (top)
- 01:45, 22 November 2013 (diff | hist) . . (+9,438) . . N RWP Practical aspects (Created page with "There can be no doubt that high-quality wind observations of RWP are beneficial for [http://en.wikipedia.org/wiki/Numerical_weather_prediction NWPM]. The challenge of operatio...") (top)
- 01:44, 22 November 2013 (diff | hist) . . (+2,634) . . N RWP Error characteristics (Created page with "A large number of publications have discussed the accuracy and precision of RWP data based on comparisons with independent measurements (meteorological towers, tethered balloo...") (top)
- 01:43, 22 November 2013 (diff | hist) . . (+9,326) . . N RWP Operational use (Created page with "=== Historical development === After the first successful demonstration of clear-air wind measurements by [http://journals.ametsoc.org/doi/abs/10.1175/1520-0469%281974%29031...") (top)
- 01:41, 22 November 2013 (diff | hist) . . (0) . . N File:Dbs.jpg (top)
- 01:41, 22 November 2013 (diff | hist) . . (+4,037) . . N Doppler beam swinging (DBS) (Created page with "At least three linear independent beam directions and some assumptions concerning the wind field are required to transform the measured 'line-of-sight' radial velocities into ...") (top)
- 01:40, 22 November 2013 (diff | hist) . . (+3,855) . . N Signal detection, classification and moment estimation (Created page with "=== Noise level estimation === To discriminate between electronic noise and echo signals, a mean noise level <math>P_N</math> is objectively estimated using the method of [h...") (top)
- 01:39, 22 November 2013 (diff | hist) . . (+3,586) . . N Estimation of the Doppler spectrum (Created page with "=== Generalities === With the assumption that the coherently integrated time series <math>S^{ci} [m]</math> for atmospheric returns can be regarded as a stationary Gaussian r...") (top)
- 01:38, 22 November 2013 (diff | hist) . . (0) . . N File:RWP ci.png (top)
- 01:37, 22 November 2013 (diff | hist) . . (+3,326) . . N Digital pre-filtering (Created page with "After demodulation and range gating, the receiver signal <math>\mathbf{S}</math> at one particular range gate forms a discrete complex time series for <math>k= 0,\ldots, N_{ci...") (top)
- 01:37, 22 November 2013 (diff | hist) . . (+4,333) . . N Demodulation, range gating and A/D conversion (Created page with "=== Narrowband receiver signal === The narrow-band RWP signal at the output port of the low noise amplifier can be written as <math>S_{rx}(t)=A(t)\cos \left[\omega_c t + \Ph...") (top)
- 01:36, 22 November 2013 (diff | hist) . . (+2,077) . . N RWP receiver signal properties (Created page with "The RWP antenna receives the backscattered electromagnetic wave and converts it into a measurable voltage or current signal at the antenna output port, which contains all the ...") (top)
- 01:35, 22 November 2013 (diff | hist) . . (+3,278) . . N Example: 482 MHz profiler (Created page with "The following discussion illustrates the 482 MHz instruments used in the operational network of the DWD. A block diagram of the general hardware architecture is given in Fig....") (top)
- 01:26, 22 November 2013 (diff | hist) . . (0) . . N File:Foto Bayreuth.jpg (top)
- 01:54, 21 November 2013 (diff | hist) . . (0) . . N File:HyMeX Arome WMed.png (top)
- 01:53, 21 November 2013 (diff | hist) . . (0) . . N File:Example CN-MET.jpg (top)
- 01:52, 21 November 2013 (diff | hist) . . (0) . . N File:Wp.11.jpg (top)
- 01:51, 21 November 2013 (diff | hist) . . (0) . . N File:Wp.10.jpg (top)
- 01:51, 21 November 2013 (diff | hist) . . (0) . . N File:Wp.9.jpg (top)
- 01:51, 21 November 2013 (diff | hist) . . (0) . . N File:Wp.8.jpg (top)
- 01:50, 21 November 2013 (diff | hist) . . (0) . . N File:Wp.7.jpg (top)
- 01:50, 21 November 2013 (diff | hist) . . (0) . . N File:Wp.6.jpg (top)
- 01:50, 21 November 2013 (diff | hist) . . (0) . . N File:Wp.5.jpg (top)
- 01:49, 21 November 2013 (diff | hist) . . (0) . . N File:Wp.4.jpg (top)
- 01:49, 21 November 2013 (diff | hist) . . (0) . . N File:Wp.3.jpg (top)
- 01:49, 21 November 2013 (diff | hist) . . (0) . . N File:Wp.2.jpg (top)
- 01:48, 21 November 2013 (diff | hist) . . (0) . . N File:Wp.1.jpg (top)
- 01:44, 21 November 2013 (diff | hist) . . (0) . . N File:Cn.1.jpg (top)
- 01:42, 21 November 2013 (diff | hist) . . (0) . . N File:COSMO-2.png (top)
- 01:42, 21 November 2013 (diff | hist) . . (0) . . N File:CWINDE.png (top)
- 01:41, 21 November 2013 (diff | hist) . . (0) . . N File:LWP Jan 2010.png (top)
- 01:40, 21 November 2013 (diff | hist) . . (0) . . N File:Histogram LWP kl.png (top)
- 01:39, 21 November 2013 (diff | hist) . . (0) . . N File:Brandau Reff N.png (top)
- 01:39, 21 November 2013 (diff | hist) . . (0) . . N File:Brandau cloudnet.png (top)
- 01:37, 21 November 2013 (diff | hist) . . (0) . . N File:LIQUID CLOUD PARAMETERS.png
- 01:36, 21 November 2013 (diff | hist) . . (0) . . N File:Iwv lwp q.png (top)
- 01:34, 21 November 2013 (diff | hist) . . (0) . . N File:Mh.7.jpg (top)
- 01:34, 21 November 2013 (diff | hist) . . (0) . . N File:Mh.6.jpg (top)
- 01:34, 21 November 2013 (diff | hist) . . (0) . . N File:Mh.5.jpg (top)
- 01:33, 21 November 2013 (diff | hist) . . (0) . . N File:Mh.4.jpg (top)
- 01:31, 21 November 2013 (diff | hist) . . (0) . . N File:Mh.3.jpg (top)
- 01:30, 21 November 2013 (diff | hist) . . (0) . . N File:Mh.2.jpg (top)
- 01:29, 21 November 2013 (diff | hist) . . (0) . . N File:Mh.1.jpg (top)
- 01:22, 21 November 2013 (diff | hist) . . (0) . . N File:E-7.png (top)
- 01:21, 21 November 2013 (diff | hist) . . (0) . . N File:E-3.png (top)
- 01:20, 21 November 2013 (diff | hist) . . (0) . . N File:E-1.png (top)
- 01:18, 21 November 2013 (diff | hist) . . (0) . . N File:3.jpg (top)
- 01:17, 21 November 2013 (diff | hist) . . (0) . . N File:2.jpg (top)
- 01:16, 21 November 2013 (diff | hist) . . (0) . . N File:Sar.3b.jpg (top)
- 01:15, 21 November 2013 (diff | hist) . . (0) . . N File:Sar.3a.jpg (top)
- 01:14, 21 November 2013 (diff | hist) . . (0) . . N File:Sar.2.jpg (top)
- 01:13, 21 November 2013 (diff | hist) . . (0) . . N File:Sar.1.jpg (top)
- 01:12, 21 November 2013 (diff | hist) . . (0) . . N File:VVP1.png (top)
- 01:11, 21 November 2013 (diff | hist) . . (0) . . N File:VVP2.png (top)
- 01:10, 21 November 2013 (diff | hist) . . (0) . . N File:VAD.png (top)
- 01:08, 21 November 2013 (diff | hist) . . (0) . . N File:Volume.png (top)
- 01:07, 21 November 2013 (diff | hist) . . (0) . . N File:Stat DWD WV 2004.png (top)
- 01:04, 21 November 2013 (diff | hist) . . (0) . . N File:RamanWaterVapor.png (top)
- 01:03, 21 November 2013 (diff | hist) . . (+1) . . Final Report (→Available Techniques)
- 01:02, 21 November 2013 (diff | hist) . . (0) . . N File:Hum RMSE BIAS Payerne Darwin from Lohnert2009.png (top)
- 00:59, 21 November 2013 (diff | hist) . . (0) . . N File:DFS MidLat Tropics.png (top)
- 00:56, 21 November 2013 (diff | hist) . . (0) . . File:Terror.jpg (Adminchia uploaded "File:Terror.jpg") (top)
- 00:09, 21 November 2013 (diff | hist) . . (0) . . N File:Tprofexam.gif (top)
- 22:51, 20 November 2013 (diff | hist) . . (+89,816) . . Final Report
- 22:35, 20 November 2013 (diff | hist) . . (+633) . . N Reflections from the ground surrounding the RWP (through antenna sidelobes) (Created page with "Ground clutter echoes are observed due to the ubiquitous sidelobes of finite aperture antennas in comibination with the high receiver sensitivity, see e.g. [http://journals.am...") (top)
- 22:35, 20 November 2013 (diff | hist) . . (+773) . . N Reflections from airborne objects (Created page with "Scattering at larger flying objects like airplanes ([http://www.radiometrics.com/hogg_jcam83a.pdf Hogg et.al., 1983], [http://journals.ametsoc.org/doi/abs/10.1175/1520-0426%28...") (top)
- 22:34, 20 November 2013 (diff | hist) . . (+669) . . N Scattering at unbound electric charges (Created page with "Scattering at the plasma in lightning channels is sometimes observed with RWP (see [http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V95-4GFCSSK-1&_user=750304&_cove...") (top)
- 22:32, 20 November 2013 (diff | hist) . . (+377) . . N Particle scattering (Created page with "Scattering at small particles, like droplets or ice crystals are the second major scattering mechanism for RWP's. The Rayleigh approximation can be easily used for simplificat...") (top)
- 22:31, 20 November 2013 (diff | hist) . . (+1,280) . . N Clear air scattering (Created page with "Most relevant for RWP is certainly clear-air or Bragg scattering at fluctuations of the refractive index, see e.g. [http://www.agu.org/journals/ABS/1969/RS004i012p01179.shtml ...") (top)
- 22:29, 20 November 2013 (diff | hist) . . (+4,388) . . N RWP Fundamentals (Created page with "== Scattering mechanisms == The unique characteristic of RWP is their use of longer wavelengths, in comparison with classical weather radars. The typical wavelength range is ...") (top)
- 22:28, 20 November 2013 (diff | hist) . . (+1,752) . . N Radar wind profiler (Created page with "== Introduction == Radar wind profilers (RWP) are special Doppler radars designed for measuring the vertical profile of the wind vector in the lowest 5 - 20 km of the atmosph...") (top)
- 16:19, 22 April 2013 (diff | hist) . . (+58,054) . . Final Report
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