diff --git a/antenna.html b/antenna.html index f897a5f9d9dd706f5a300c42ef32a519ae1ea7b2..63ee4a0393078388dbb3dd83a3e84cb2d8f1679e 100644 --- a/antenna.html +++ b/antenna.html @@ -156,9 +156,9 @@ equivalent flux density is the flux density of a radio source that doubles the s <td>1</td> <td>linear</td> <td>primary</td> -<td>48’</td> +<td>48’(*)</td> <td>[50-80]</td> -<td>[0.52]</td> +<td>0.52</td> <td>125</td> </tr> <tr class="row-odd"><td>L</td> @@ -166,9 +166,9 @@ equivalent flux density is the flux density of a radio source that doubles the s <td>1</td> <td>linear</td> <td>primary</td> -<td>11.4’</td> +<td>11.4’(*)</td> <td>25-35</td> -<td>[0.55]</td> +<td>0.55</td> <td>36</td> </tr> <tr class="row-even"><td>C-high</td> @@ -188,13 +188,13 @@ equivalent flux density is the flux density of a radio source that doubles the s <td>Gregorian</td> <td>0.8’(**)</td> <td>90(**)</td> -<td>0.45-065</td> +<td>0.45-0.65</td> <td>138(**)</td> </tr> </tbody> </table> <p>[ ] is an estimate -(*) at 6.7 GHz +(*) at the band’s central frequency (**) at 22.3 GHz with opacity 0.1 and ground air temperature of 293K.</p> <p>The FWHM beam size, as a function of the frequency f, can be approximated by the following rule: FWHM(arcmin)=19.7/ f(GHz)</p> <p>SRT receiver changes are quick, allowing for an efficient frequency agility. The selected receiver is set in its focal position within at most a few minutes. @@ -581,41 +581,41 @@ and can be included in the observation schedule.</p> </div> <div class="section" id="gain-curve-calibration"> <h2>Gain curve calibration<a class="headerlink" href="#gain-curve-calibration" title="Permalink to this headline">¶</a></h2> -<p>From the measured gain curves (Gain vs. Elevation), one fits a 2-degree polynomial with the following parameters C0, C1 and C2:</p> -<ul class="simple"> -<li>L-band</li> -</ul> -<p>Values adopted same as Bolli et al (2015)</p> -<ul class="simple"> -<li>C-band</li> -</ul> +<p>From the measured gain curves (Gain vs. Elevation), one fits a 2-degree polynomial with the parameters C0, C1 and C2:</p> +<p>gain (K/Jy) = C2 El^2 + C1 El + C0</p> <table border="1" class="docutils"> <colgroup> -<col width="28%" /> -<col width="36%" /> -<col width="36%" /> +<col width="20%" /> +<col width="25%" /> +<col width="29%" /> +<col width="27%" /> </colgroup> <thead valign="bottom"> <tr class="row-odd"><th class="head">Parameter</th> +<th class="head">Value (L-band)</th> <th class="head">Value (C-band)</th> <th class="head">Value (K-band)</th> </tr> </thead> <tbody valign="top"> <tr class="row-even"><td>C0</td> +<td>0.5061</td> <td>0.545439</td> <td>0.505427</td> </tr> <tr class="row-odd"><td>C1</td> +<td>0.002390</td> <td>0.00525597</td> <td>0.00864506</td> </tr> <tr class="row-even"><td>C2</td> +<td>-0.000021</td> <td>-4.55697e-5</td> <td>-6.37184e-5</td> </tr> </tbody> </table> +<p>L-band: from Orlati et al.</p> <p>C-band: valid from 2018.</p> <p>K-band: from Prandoni et al. (2017).</p> </div> @@ -755,7 +755,9 @@ spectra containing the signal from the noise diode (when used).</p> <p>Spectral-polarimetric techniques with SRT: <a class="reference external" href="https://arxiv.org/abs/1607.03636">Sardinia Radio Telescope wide-band spectral-polarimetric observations of the galaxy cluster 3C 129</a>.</p> <p>ROACH1 backend for baseband data recording and pulsar observations: <a class="reference external" href="http://www.oa-cagliari.inaf.it/area.php?page_id=10&skip=3">OAC Internal Report N. 39</a>.</p> <p>SARDARA backend description: <a class="reference external" href="https://www.worldscientific.com/doi/full/10.1142/S2251171718500046">SARDARA</a>.</p> -<p>Pointing calibration: <a class="reference external" href="http://www.oa-cagliari.inaf.it/area.php?page_id=10&skip=4">Tarchi et al. (2013) OAC Internal Report N. 27</a> & Ricci et al (2016).</p> +<p>Gain curve calibration at L-band: <a class="reference external" href="http://www.ira.inaf.it/Library/rapp-int/499-16.pdf">Orlati et al.</a>.</p> +<p>Pointing calibration: <cite>Tarchi et al. (2013) OAC Internal Report N. 27 <http://www.oa-cagliari.inaf.it/area.php?page_id=10&skip=4></cite></p> +<p><a class="reference external" href="http://www.ira.inaf.it/Library/rapp-int/496-16.pdf">Ricci et al., “A first extented catalogue of pointing/focus calibrators for the Sardinia Radio Telescope”</a>.</p> </div> <div class="section" id="user-guide-and-observing-modes"> <h1>User guide and observing modes<a class="headerlink" href="#user-guide-and-observing-modes" title="Permalink to this headline">¶</a></h1> diff --git a/antenna.rst b/antenna.rst index 0faa48adeb8a93d04ad089b701e6ef52aa856a4e..2c6d793a4f34728f2512c184fd45d3790f4f2939 100644 --- a/antenna.rst +++ b/antenna.rst @@ -86,14 +86,14 @@ equivalent flux density is the flux density of a radio source that doubles the s ======== ========================= ======= ================= =============== ========== ========== =========== ========== Band Frequency coverage (GHz) Feeds Polarization type Focal position Beam size Tsys (K) Gain (K/Jy) Sefd (Jy) ======== ========================= ======= ================= =============== ========== ========== =========== ========== -P 0.30 -- 0.36 1 linear primary 48' [50-80] [0.52] 125 -L 1.3 -- 1.8 1 linear primary 11.4' 25-35 [0.55] 36 +P 0.30 -- 0.36 1 linear primary 48'(*) [50-80] 0.52 125 +L 1.3 -- 1.8 1 linear primary 11.4'(*) 25-35 0.55 36 C-high 5.7 -- 7.7 1 circular beam waveguide 2.7' 32-37(*) 0.60 43(*) -K 18 -- 26 7 circular Gregorian 0.8'(**) 90(**) 0.45-065 138(**) +K 18 -- 26 7 circular Gregorian 0.8'(**) 90(**) 0.45-0.65 138(**) ======== ========================= ======= ================= =============== ========== ========== =========== ========== [ ] is an estimate -(*) at 6.7 GHz +(*) at the band's central frequency (**) at 22.3 GHz with opacity 0.1 and ground air temperature of 293K. The FWHM beam size, as a function of the frequency f, can be approximated by the following rule: FWHM(arcmin)=19.7/ f(GHz) @@ -276,21 +276,19 @@ The observer should perform a focus calibration before starting an observing ses Gain curve calibration ---------------------- -From the measured gain curves (Gain vs. Elevation), one fits a 2-degree polynomial with the following parameters C0, C1 and C2: +From the measured gain curves (Gain vs. Elevation), one fits a 2-degree polynomial with the parameters C0, C1 and C2: -* L-band +gain (K/Jy) = C2 El^2 + C1 El + C0 -Values adopted same as Bolli et al (2015) +=========== ============== ================ =============== +Parameter Value (L-band) Value (C-band) Value (K-band) +=========== ============== ================ =============== +C0 0.5061 0.545439 0.505427 +C1 0.002390 0.00525597 0.00864506 +C2 -0.000021 -4.55697e-5 -6.37184e-5 +=========== ============== ================ =============== -* C-band - -=========== ============== ============== -Parameter Value (C-band) Value (K-band) -=========== ============== ============== -C0 0.545439 0.505427 -C1 0.00525597 0.00864506 -C2 -4.55697e-5 -6.37184e-5 -=========== ============== ============== +L-band: from Orlati et al. C-band: valid from 2018. @@ -373,7 +371,11 @@ ROACH1 backend for baseband data recording and pulsar observations: `OAC Interna SARDARA backend description: `SARDARA <https://www.worldscientific.com/doi/full/10.1142/S2251171718500046>`_. -Pointing calibration: `Tarchi et al. (2013) OAC Internal Report N. 27 <http://www.oa-cagliari.inaf.it/area.php?page_id=10&skip=4>`_ & Ricci et al (2016). +Gain curve calibration at L-band: `Orlati et al. <http://www.ira.inaf.it/Library/rapp-int/499-16.pdf>`_. + +Pointing calibration: `Tarchi et al. (2013) OAC Internal Report N. 27 <http://www.oa-cagliari.inaf.it/area.php?page_id=10&skip=4>` + +`Ricci et al., "A first extented catalogue of pointing/focus calibrators for the Sardinia Radio Telescope" <http://www.ira.inaf.it/Library/rapp-int/496-16.pdf>`_. User guide and observing modes ==============================