Author name code: rodriguez-hidalgo ADS astronomy entries on 2022-09-14 author:"Rodriguez Hidalgo, Ines" ------------------------------------------------------------------------ Title: ``May infinity be left without stars''. Dissemination of Astronomy from planetariums and science museums Authors: Rodríguez Hidalgo, I. Bibcode: 2019hsax.conf..646R Altcode: The title (borrowed from a famous bolero) is not so exaggerated when we remember that more than twenty five planetariums, scattered about the Spanish territory, do ``ex officio'' the magic of making the stars accessible to the public. They are unique spaces that simulate, in a very realistic way, the celestial vault as seen from different places and dates, giving back to their visitors the emotion of gazing at a night sky free of light pollution. They can also project fulldome programs of astronomical content. Therefore, planetariums turn into valuable tools for the teaching and dissemination of Astronomy. At the same time, more than twenty Spanish science museums, with or without planetarium, bring Astronomy closer to the public of all ages and backgrounds through numerous and varied activities. This paper aims to be a meeting between the Spanish professional astronomers and those essential allies in the dissemination of Astronomy. The last ones offer intelligent fun and unforgettable experiences, transmitting basic knowledge and showcasing the latest advances. They definitely contribute to promote vocations and to educate society in positive attitudes towards Astronomy and Science in general. Title: Confieso que Divulgo. Reflexiones y Experiencias de una Astrofísica Authors: Rodríguez Hidalgo, I. Bibcode: 2010ASSP...14..241R Altcode: 2010hsa5.conf..241R Este artículo presenta algunas reflexiones en torno a la popularización de la Ciencia, desarrolladas a lo largo de mi trayectoria profesional, un camino inacabado desde la intuición al oficio. Tras revisar las señas de identidad de la divulgación científica, se exponen ideas, experiencias y recursos, cribados por la práctica y su posterior análisis crítico. Se destacan las actividades relacionadas con la Astronomía, que se cuentan entre las más espectaculares y gratificantes. Confessions of a popularizer: This paper presents some author's thoughts about scientific outreach, developed along her professional path, an unfinished way from intuition to trade. First, identity signs of outreach are revised; then, ideas, experiences and resources, sifted by practice and further critical analysis, are reviewed. Activities related to Astronomy, being one of the most spectacular and rewarding, are remarked 1 Title: Meteorite, a rock from space: A planetarium adventure for children Authors: Rodríguez Hidalgo, I.; Naveros Y Naveiras, R.; González Sánchez, O. Bibcode: 2008ca07.conf..508R Altcode: At the Museum of the Science and the Cosmos (MCC, La Laguna, Tenerife) there is a small planetarium. All the different planetarium shows are carried out entirely by the Museum staff, from the original idea and the script to the final production. In February 2007, Meteorite, a rock from space, a new show, specifically for children, was released. The characters (astronomical bodies) are played by puppets, designed and manufactured for this occasion; the script has been carefully written, and introduces many astronomical concepts in the form of an entertaining tale, which encourages the children to participate by crying, counting, helping the characters - just like a traditional puppet show. The aim of this contribution is to review the different resources (some of them really innovative) used to create this programme, which offers plenty of future possibilities. Title: Do the Stars Tell Your Love Story? Authors: Rodriguez Hidalgo, I. Bibcode: 2005ca05.conf..152R Altcode: A good alternative to traditional methods of passing on astronomical concepts is to use a 'collateral' story that catches the public's attention. It may also simultaneously give a vital opportunity to awaken the critical faculty that often seems so perilously close to extinction these days. The recipe is simple: nothing but an actor or actress, his/her voice and hands, and a script on a topic of wide popular interest, with bits of magic and humour. A live example was shown during the Meeting (see the webcast). The text of that performance is presented in this paper, followed by an analysis and discussion of the proposed resource. Title: Time for Space: Five Minutes a Week for Astronomy Authors: Rodriguez Hidalgo, Inés Bibcode: 2005coas.conf..172R Altcode: No abstract at ADS Title: Outreach and the Professional Astronomer: a Survey of Attitudes Authors: Diaz Vilela, Luis; Rodriguez Hidalgo, Inés Bibcode: 2005coas.conf..107D Altcode: No abstract at ADS Title: Outreach as seen by the Spanish professional astronomers: a survey of beliefs, attitudes, and activities Authors: Rodríguez Hidalgo, I.; Díaz Vilela, L. F. Bibcode: 2005EAS....16...81R Altcode: A survey of outreach related beliefs, attitudes, and activities of the Spanish professional astronomers is presented. More than one hundred scientists answered an ad-hoc drawn up questionnaire, whose results have been analysed statistically. This feedback form is an improved version of that used in a previous research carried out by the authors with a sample of members of the Instituto de Astrofísica de Canarias (Díaz Vilela & Rodríguez Hidalgo 2005). Some of the studied items are the actual time and effort devoted to outreach by a researcher, the role of outreach within his work, the valuation of outreach activities in his curriculum, socially, or economically, the opinion about who should have the responsibility of organising and performing popularisation tasks, etc. Three kinds of studies have been performed: the descriptive one is based on the frequencies and means of variables; a Principal Component Analysis was applied to get a shorter number of belief-attitude dimensions; and an inferential one, derived from a Multiple Regression Analysis which provides a reliable description of the beliefs-attitudes scale grouping outreach related beliefs into 6 components, 3 of them more significant. A simple regression allows us to predict about a 50% of the variance of the outreach practices. Title: Getting Photometric Spatial Resolution from 2-D Spectropolarimetric Data Authors: Rodríguez Hidalgo, I.; Ruiz Cobo, B. Bibcode: 2003ASPC..307..145R Altcode: No abstract at ADS Title: Recent advances and future projects in solar instrumentation at the Instituto de Astrofísica de Canarias Authors: Rodríguez Hidalgo, Inés Bibcode: 2002ESASP.477..593R Altcode: 2002scsw.conf..593R The main advances in instrumentation for Solar Physics during the past year at the Instituto de Astrofisica de Canarias (IAC) are reviewed. In addition, some exciting new projects for the future are presented, like building an imaging magnetograph to fly on board Sunrise, IMaX. This contribution has been presented within the Meeting on New Solar Instrumentation corresponding to the annual session of the JOSO Working Group 2. Title: JOSO national report 2000-2001 - Spain. (Solar physics in Spain) Authors: Rodríguez Hidalgo, I. Bibcode: 2002joso.book..103R Altcode: The most relevant advances and developments of the Solar "activity" in Spain during the last two years are reviewed, classified according to the different institutes and universities where solar research is carried out. Title: Observation of Convective Collapse and Upward-moving Shocks in the Quiet Sun Authors: Bellot Rubio, Luis R.; Rodríguez Hidalgo, Inés; Collados, Manuel; Khomenko, Elena; Ruiz Cobo, Basilio Bibcode: 2001ApJ...560.1010B Altcode: We present spectropolarimetric evidence of convective collapse and destruction of magnetic flux by upward-moving fronts in the quiet Sun. The observational material consists of time series of the full Stokes vector of two infrared spectral lines emerging from regions associated with Ca II K network points. The amplitude of the circular polarization profiles of a particular spatial point is seen to increase while the profiles are redshifted. It then decreases during a much shorter phase characterized by large blueshifts. Inspection of the data indicates that the blueshift occurs because of the sudden appearance of a new, strongly displaced Stokes V profile of the same polarity. The amplification of the magnetic signal takes place in a time interval of about 13 minutes, while blueshifts and the concomitant decreasing Stokes V amplitudes last for only 2 minutes. An inversion code based on the thin flux-tube scenario has been applied to the data in order to derive the thermal, magnetic, and dynamic structures of the atmosphere. According to our results, the field strength undergoes a moderate increase from 400 to 600 G at z=0 km during the phase in which redshifts are present. The observed redshifts are produced by internal downflows of up to 6 km s-1 at z=0 km. After ~13 minutes, the material falling down inside the tube appears to bounce off in the deeper layers, originating an upward-propagating front whose manifestation on the Stokes V profiles is a large blueshift. The front moves with a speed of 2.3 km s-1 and has a downflow-to-upflow velocity difference of about 7 km s-1 initially and some 4 km s-1 after 2 minutes. It strongly weakens the magnetic field strength and may be responsible for the complete destruction of the magnetic feature. The observed behavior is in general agreement with theoretical predictions of flux expulsion, convective collapse, and development of shocks within magnetic flux tubes. Title: Lagrangian and Eulerian Stratifications of Acoustic Oscillations through the Solar Photosphere Authors: Rodríguez Hidalgo, Inés; Ruiz Cobo, Basilio; Collados, Manuel; Bellot Rubio, Luis R. Bibcode: 2001ApJ...547..491R Altcode: We evaluate the stratification of acoustic oscillations in the solar photosphere in both the Lagrangian (comoving) frame of reference and the Eulerian (inertial) frame of reference, from a temporal sequence of model atmospheres in an optical depth scale obtained after a quasi-non-LTE inversion of the radiative transfer equation applied to spectral observations of the K I 7699 Å line. Our results suggest that, to first order, the photosphere moves up and down as a whole with amplitudes ranging from ~8 km in deep layers (around 0 km) to ~19 km in the upper layers (around 640 km). In Lagrangian coordinates, we observe numerous short-lived, local temperature and velocity amplitude enhancements in medium-high layers, together with asymmetric waveforms in the oscillation of these two physical quantities. The Lagrangian temperature oscillation clearly shows two nodes associated with sharp phase jumps of about 180°, whereas the velocity amplitude shows the well-known increase with geometrical height, at nearly constant phase. In Eulerian coordinates, the perturbations are dominated by the coherent oscillation of the entire photosphere. Title: Photospheric acoustic oscillations in a Langrangian reference system Authors: Rodríguez Hidalgo, I.; Ruiz Cobo, B.; Collados Vera, M.; Bellot Rubio, L. R. Bibcode: 2001ESASP.464..239R Altcode: 2001soho...10..239R The stratification of acoustic oscillations through the solar photosphere in Lagrangian (comoving) coordinates has been evaluated from a quasi-NLTE inversion of the radiative transfer equation (RTE) applied to a temporal sequence of K I 7699 Å line spectra. The stratifications of amplitude and phase of the temperature and line-of-sight (LOS) velocity Lagrangian oscillations have been evaluated. Our results suggest that, to first order, the photosphere moves up and down as a whole with amplitudes ranging from ~8 km in deep layers (around 0 km) to ~19 km in the upper layers (around 640 km). Numerous short-lived, local temperature and velocity amplitude enhancements in medium-high layers are observed, together with an asymmetric waveform in the oscillation of these two physical quantities. Two nodes are clearly seen in the Lagrangian temperature oscillation run, which are associated with sharp phase jumps of about 180°. The velocity amplitude shows the well known increase with geometrical height, keeping practically in phase. Title: Oscillations in the Photosphere of a Sunspot Umbra from the Inversion of Infrared Stokes Profiles Authors: Bellot Rubio, L. R.; Collados, M.; Ruiz Cobo, B.; Rodríguez Hidalgo, I. Bibcode: 2000ApJ...534..989B Altcode: We report on the detection of magnetic field strength and velocity oscillations in the photosphere of a sunspot umbra. Our analysis is based on the inversion of the full Stokes vector of three Fe I lines at 15650 Å, from which the stratification with optical depth of the different atmospheric parameters has been derived. This allows us to estimate the amplitude of the oscillations and the phase lag between the fluctuations in the line-of-sight velocity and field strength. Our results suggest that the inferred magnetic field oscillations are caused by opacity fluctuations that move upward and downward the region where the spectral lines are sensitive to magnetic fields. Title: Recent Developments in Solar Instrumentation at the Instituto de Astrofisica de Canarias Authors: Rodríguez-Hidalgo, I. Bibcode: 2000ESASP.463..623R Altcode: 2000sctc.proc..623R No abstract at ADS Title: Recent Instrumental Developments in Solar Physics at the Instituto de Astrofisica de Canarias Authors: Rodríguez Hidalgo, I. Bibcode: 1999ESASP.448.1305R Altcode: 1999mfsp.conf.1305R; 1999ESPM....9.1305R No abstract at ADS Title: The Last Total Eclipse of the Millennium as Seen by Shelio99 Authors: Rodríguez Hidalgo, I.; Abajas, C.; Shelios99 Team Bibcode: 1999ESASP.448.1295R Altcode: 1999mfsp.conf.1295R; 1999ESPM....9.1295R No abstract at ADS Title: Formation and Destruction of a Weak Magnetic Feature in the Solar Photosphere Authors: Khomenko, E.; Collados, M.; Bellot Rubio, L. R.; Rodríguez Hidalgo, I.; Ruiz Cobo, B. Bibcode: 1999ESASP.448..307K Altcode: 1999mfsp.conf..307K; 1999ESPM....9..307K No abstract at ADS Title: Velocity and Temperature 5 Minute Oscillations as Functions of Geometrical Height in the Photosphere Authors: Rodríguez Hidalgo, I.; Ruiz Cobo, B.; Collados, M. Bibcode: 1999ASPC..184..176R Altcode: The stratification with geometrical height of the velocity and temperature 5 minute oscillation through the solar photosphere is obtained after the inversion of a time series of KI 7699 Å line spectra taken at disk center. Title: Quiet and Active Granulation Properties Authors: Manso Sainz, R.; Rodríguez Hidalgo, I.; Collados, M. Bibcode: 1999ASSL..239..197M Altcode: 1999msa..proc..197M The preliminary results of a classical spectroscopic analysis of a facular region at mu=0.78 of ~100 arcsec x 50 arcsec are presented. The variation with magnetic activity of several spectroscopic parameters has been studied, showing clear evidence that granulation properties are modified. Title: Granular and Intergranular Model Atmospheres from Inversion of Solar Two-Dimensional Spectroscopic Data Authors: Rodríguez Hidalgo, I.; Ruiz Cobo, B.; Collados, M.; del Toro Iniesta, J. C. Bibcode: 1999ASPC..173..313R Altcode: 1999sstt.conf..313R No abstract at ADS Title: TIP (Tenerife Infrared Polarimeter): a near IR full Stokes Polarimeter for the German Solar Telescopes at Observatorio del Teide Authors: Collados, M.; Rodríguez Hidalgo, I.; Bellot Rubio, L.; Ruiz Cobo, B.; Soltau, D. Bibcode: 1999AGAb...15Q..11C Altcode: 1999AGM....15..A13C In this contribution, the main characteristics of the=20 Tenerife Infrared Polarimeter (TIP), recently built at the Instituto de Astrofísica de Canarias, to be operated at the German Solar Telescopes (GCT and VTT) of the Observatorio del Teide (Tenerife) are presented. Especial emphasis is put on the modulation scheme, polarisation efficiencies, signal-to-noise ratio, spatial and spectral resolution, and instrumental polarisation cross-talk. Some examples of data recently obtained are presented, which give an idea of the performance and capabilities of this instrument. Title: Thermodynamical properties of granulation in active regions. Authors: Rodríguez Hidalgo, I.; Collados, M.; Manso Sainz, R.; Barkler, J. Bibcode: 1999joso.proc..195R Altcode: A two-dimensional spectroscopic study of two solar active regions is presented. A magnetic filling factor has been defined, and a new technique to separate large and small spatial scale motions has been used. Different types of features in the fields of view have been classified according to their magnetic and convective properties, and have been analysed with varying magnetic activity. Title: Oscillations in a sunspot umbra from the inversion of infrared Stokes profiles Authors: Bellot Rubio, Luis R.; Collados, Manuel; Ruiz Cobo, Basilio; Rodríguez Hidalgo, Inés; Bogdan, Thomas J. Bibcode: 1999AGM....15..A07B Altcode: We report on the detection of magnetic field strength and velocity oscillations in the photosphere of a sunspot umbra. Our analysis is based on the inversion of the full Stokes profiles of three Fe I lines at 15650 Å, from which the stratification with optical depth of the different atmospheric parameters has been derived. This allows us to estimate the amplitude of the oscillations and the phase lag between the fluctuations in the line-of-sight velocity and field strength. Our results suggest that the inferred magnetic field oscillations are caused by opacity fluctuations that move upward and donward the region where the spectral lines are sensitive to magnetic fields. Title: Stratification with Optical Depth of the 5 Minute Oscillation through the Solar Photosphere Authors: Ruiz Cobo, Basilio; Rodríguez Hidalgo, Inés; Collados, Manuel Bibcode: 1997ApJ...488..462R Altcode: An analysis of the 5 minute oscillation in the solar photosphere has been carried out using an inversion of the radiative transfer equation applied to a time-series of K I λ7699 line spectra with a 5" × 5" window at disk center. A thorough discussion of the inversion conditions, with special emphasis on the LTE approach and a careful error treatment, is offered. The inversion has been performed introducing fixed non-LTE departure coefficients taken from the literature. A sequence of instantaneous model atmospheres has been obtained, reliable from log τ ~= 0 to log τ ~= -3.5. From the temporal power spectra of line-of-sight velocity and temperature fluctuations, the amplitude and phase stratifications of the oscillations of these magnitudes have been obtained as functions of the optical depth. The amplitude accuracies are better than 4 m s-1 and 2 K in most of the photosphere. The increase of the velocity oscillation amplitude toward higher photospheric layers has been confirmed and quantified. Its phase angle remains constant through the photosphere, and significant power is obtained in temperature. Title: Stratification of the 5-min oscillation through the solar photosphere Authors: Rodríguez Hidalgo, I.; Ruiz Cobo, B.; Collados, M. Bibcode: 1997SoPh..172...77R Altcode: 1997ESPM....8...77R The inversion of the radiative transfer equation has been applied to a time series of low spatial resolution Ki 7699 Å line spectra, allowing us to obtain a sequence of instantaneous models which are compared to the mean one to derive the 5-min oscillation stratification. The resulting models are reliable from log τ ≃ 0 to log τ ≃ -3.5. The increase of the velocity oscillation amplitude towards higher photospheric layers has been confirmed and quantified. Significant oscillation is observed in temperature. Title: Two-dimensional, high spatial resolution, solar spectroscopy using a correlation tracker. I. Correlation tracker description. Authors: Ballesteros, E.; Collados, M.; Bonet, J. A.; Lorenzo, F.; Viera, T.; Reyes, M.; Rodriguez Hidalgo, I. Bibcode: 1996A&AS..115..353B Altcode: In this paper the description of the Solar Correlation Tracker prototype built by the Instituto de Astrof isica de Canarias is presented. The system is mainly conceived as a solar image tranquilizer, although a scanning utility has also been included in order to displace the image on the final focal plane with sub-arcsecond steps, thus allowing to perform two-dimensional high spatial resolution spectroscopy. The behaviour of the different elements of the tracker is shown, as well as their influence in the performance of the system. The restrictions of the Absolute Differences algorithm, used to detect image motion when granulation fields are considered, are extensively discussed. Laboratory and telescope tests have demonstrated the capabilities of the system. The electronic components have been adapted to new optics and mechanics developed at the Kiepenheuer Institut to build an Advanced Solar Correlation Tracker. The final version of the system has been installed at the German VTT of the Spanish Observatorio del Teide. The tests carried out have demonstrated that a bandwidth of about 60Hz (for an attenuation factor of two) is achieved, which is approximately four times larger than that of previous Correlation Trackers, at the same level of attenuation. Title: Two-dimensional, high spatial resolution, solar spectroscopy using a Correlation Tracker. II. Maps of spectral quantities. Authors: Collados, M.; Rodriguez Hidalgo, I.; Ballesteros, E.; Ruiz Cobo, B.; Sanchez Almeida, J.; del Toro Iniesta, J. C. Bibcode: 1996A&AS..115..367C Altcode: In this paper we illustrate some of the capabilities of the Correlation Tracker prototype developed at the Instituto de Astrofisica de Canarias used for two-dimensional, high spatial resolution, solar spectroscopy. Slit spectra have been taken, using the Correlation Tracker as a stabilizer (minimizing image motion during exposures) and as an accurate positioning device (allowing to precisely locate the entrance slit of the spectrograph at adjacent positions on the solar disc). Spectral information is obtained from several solar regions of different sizes. Granules (including some exploding ones) and intergranules are clearly resolved. Several sub-arcsecond structures are undoubtedly distinguished as well. The two-dimensional variation of several spectral quantities in the solar atmosphere is shown, demonstrating the power of this technique and its future possibilities. Title: Amplitude and phase stratification of the solar 5-minute temperature and velocity oscillations through the photosphere Authors: Rodriguez Hidalgo, I.; Ruiz Cobo, B.; Collados, M. Bibcode: 1996ASPC..109..151R Altcode: 1996csss....9..151R No abstract at ADS Title: Empirical granular/intergranular average model atmospheres. Authors: Rodríguez Hidalgo, I.; Ruiz Cobo, B.; Del Toro Iniesta, J. C.; Collados, M.; Sánchez Almeida, J. Bibcode: 1996joso.proc..162R Altcode: No abstract at ADS Title: Empirical model of an average solar granule Authors: Ruiz Cobo, B.; del Toro Iniesta, J. C.; Rodriguez Hidalgo, I.; Collados, M.; Sanchez Almeida, J. Bibcode: 1996ASPC..109..155R Altcode: 1996csss....9..155R No abstract at ADS Title: Variations of properties of the quiet photosphere along the equator and the central meridian: Spectroscopic results Authors: Rodriguez Hidalgo, I.; Collados, M.; Vazquez, M. Bibcode: 1994A&A...283..263R Altcode: Spectra of four lines (CI5380.3 A, MnI 5394.7 A, FeI 5930.2 A and SiI 5948.5 A) have been obtained in the quiet photosphere, at regular intervals along the polar axis and the equator. The spatially averaged spectra have been analyzed, studying the center-to-limb variation (CLV) and possible changes with the heliographic latitude of the residual intensity (RI), equivalent width (EW), full width at half line minimum (FWHM), and bisector of the line profiles. The aim of this spectroscopic study is to complete the photometric work carried out and recently published by the authors (Rodriguez Hildago et al. 1992, hereafter Paper I). It allows us to test some conclusions of Paper I and to extend our analysis to higher photospheric layers. Firstly the general behavior of the CLV is shown and discussed. From the comparison betwen the CLV along the North-South and East-West diameters, it is observed that the Cl line, formed very deep in the photosphere, broadens and shows raised minima with latitude, not showing variations in its EW, except at very high latitudes. The other three lines, which inform about the physical conditions in the middle photosphere, become deeper and stronger, and the FeI one seems broader, with latitude. The observational results are discussed in terms of physical scenarios based on changes in the velocity fields present in the photosphere (mainly of the granulation), possible spatial anisotropies in the distribution of network bright points (which would be related to differences in the mean temperature gradient) and the latitudinal variation of the granulation contrast found in Paper I. Title: Centre-to-limb variation of solar granulation along the equator and the central meridian Authors: Rodriguez Hidalgo, I.; Collados, M.; Vazquez, M. Bibcode: 1992A&A...264..661R Altcode: The paper analyzes white-light images of solar granulation taken outside active regions, at regular intervals along the polar axis and the equator, in order to study its center-to-limb variation and possible changes with the solar latitude. The 2D spatial power spectra of the brightness distribution are calculated and corrected for the distortions produced by the atmosphere and the telescope. One-dimensional integrated spectra are obtained for each position, with the geometrical foreshortening effect taken into account. A lower contrast, a smaller mean wavenumber, and a steeper center-to-limb variation of the contrast are found in the central meridian as compared to the equator. Sources of error are discussed, and different scenarios are presented in order to interpret these observational facts. Intensity fluctuations were detected until the extreme limb, with a spatial scale of about 10 arcsec. Title: Estimating the Degradation of Brightness Power Spectra of Solar Granulation from Images Outside the Disk Centre Authors: Rodriguez Hidalgo, I.; Collados, M.; Vazquez, M. Bibcode: 1992A&A...254..371R Altcode: A method is presented to estimate the influence of the atmospheric turbulence and the telescope on the mean power spectra of the granulation brightness distribution at positions outside the disk centre, derived using the determination of Fried's parameter.

The procedure is based on the differential degradation suffered by the directions perpendicular and parallel to the solar limb; the former one is more affected because it contains more power at high frequencies, due to the geometrical foreshortening effect. A certain spectral ratio is defined, which can be evaluated after the observed power spectra and can be described directly by a Korff's function for a given value of the Fried parameter r0. The best fit of the measured attenuation to the theoretical one is calculated, allowing to obtain the adequate Modulation Transfer Function to reconstruct the original power spectra. A test has been performed by evaluating the mentioned ratio after restored spectra showing that these present the required elongation up to a resolution of about 0".4. Title: Variations of properties of the quiet photosphere with heliographic latitude Authors: Rodríguez Hidalgo, Inés Lucía Bibcode: 1992PhDT.......245R Altcode: No abstract at ADS Title: Fried's Parameter Derived from Observations of Granulation Outside the Disk Centre Authors: Rodriguez Hidalgo, I.; Collados, M.; Vazquez, M. Bibcode: 1990Ap&SS.170..155R Altcode: A new method has recently been developed to obtain the Fried's parameter from observations of granulation outsude the disk centre, based on the different degradation suffered by the images on the directions parallel and perpendicular to the solar limb, due to the geometrical foreshortening. This procedure has been applied to CCD images obtained at the Swedish Solar Tower of the Observatorio del Roque de los Muchachos, with satisfactory results which are presented and discussed. Title: Photometry and Spectroscopy of the Solar Granulation Along the Polar Axis and Equator Authors: Rodriguez Hidalgo, I.; Collados, M.; Vazquez, M. Bibcode: 1990Ap&SS.170...23R Altcode: From high-resolution CCD images of granulation obtained at the Swedish Solar Tower of the Observatorio del Roque de los Muchachos at different positions on the solar disk, mean bi-dimensional spatial power spectra have been obtained at each position and restored following the method proposed by Rodríguez Hidalgoet al. (1990). The variation with latitude of the power spectrum, of the granular brightness contrast and of the mean wave number of the power spectrum are presented. The analysis is completed with spectroscopic observations obtained at the Gregory Coudé Telescope of the Observatorio del Teide. The centre-to-limb and latitudinal variation of the bisectors, residual intensities and equivalent widths are shown for several photometric lines. Title: Numerical determination of the modulation transfer function from observations of granulation outside the disk centre Authors: Rodriguez Hidalgo, I.; Collados, M. Bibcode: 1989hsrs.conf..203R Altcode: No abstract at ADS Title: Variation of the granulation with the solar latitude. Authors: Collados, M.; Rodriguez Hidalgo, I.; Vazquez, M. Bibcode: 1987PAICz..66...41C Altcode: 1987eram....1...41C Preliminary results of a search for the variation of the solar granulation properties with the heliographic latitude are presented. Within errors, no changes are found in the power spectra and sizes between N-S and E-W scans.