TERMS USED IN MANIPULATING A TRANSIT VERNIER
... 1.Centering : Centering means setting the theodolite exactly over an instrument- station so that its vertical axis lies immediately above the station- mark. It can be done by means of plumb bob suspended from a small hook attached to the vertical axis of the theodolite. The centre shifting arrangeme ...
... 1.Centering : Centering means setting the theodolite exactly over an instrument- station so that its vertical axis lies immediately above the station- mark. It can be done by means of plumb bob suspended from a small hook attached to the vertical axis of the theodolite. The centre shifting arrangeme ...
2015 - Society for Astronomical Sciences
... subject to planetary tidal encounters. Second, they are all relatively small, the largest member being 434 Hungaria with an effective diameter of about 13 km. While being small may hinder backyard telescope observations under most circumstances, the proximity of the Hungarias (just outside Mars’ orb ...
... subject to planetary tidal encounters. Second, they are all relatively small, the largest member being 434 Hungaria with an effective diameter of about 13 km. While being small may hinder backyard telescope observations under most circumstances, the proximity of the Hungarias (just outside Mars’ orb ...
orion® starseekers - NexStar Resource Site
... grouped into three categories: Alignment, Setup and Utilities. The alignment section deals with the initial telescope alignment as well as finding objects in the sky; the setup section discusses changing parameters such as tracking mode and tracking rate; finally, the Utility section reviews all of ...
... grouped into three categories: Alignment, Setup and Utilities. The alignment section deals with the initial telescope alignment as well as finding objects in the sky; the setup section discusses changing parameters such as tracking mode and tracking rate; finally, the Utility section reviews all of ...
astronomical eyepieces - Amateur Astronomers Association Delhi
... good eyepiece becomes a critical factor in image quality especially with amateur equipment. In this paper we review basics of an eyepiece system along with an a survey of what kinds of eyepiece systems are available to the average amateur astronomer I-INTRODUCTION Eyepiece is assembly of lenses plac ...
... good eyepiece becomes a critical factor in image quality especially with amateur equipment. In this paper we review basics of an eyepiece system along with an a survey of what kinds of eyepiece systems are available to the average amateur astronomer I-INTRODUCTION Eyepiece is assembly of lenses plac ...
Focus and pointing adjustments necessary for laser guide star
... 4 shows a side view of the laser table and the mirrors influencing pointing.3 Of primary interest are the mirrors labeled uplink tip/tilt, and trombone M3. 3.1 Pointing alignment At the beginning of each observing night, an alignment of the laser to the optical axis is required. This is performed wh ...
... 4 shows a side view of the laser table and the mirrors influencing pointing.3 Of primary interest are the mirrors labeled uplink tip/tilt, and trombone M3. 3.1 Pointing alignment At the beginning of each observing night, an alignment of the laser to the optical axis is required. This is performed wh ...
PDF only
... Let us now examine a contemporaneous report on Galileo’s telescope. On August 21, 1609, Galileo publicly displayed his newly improved telescope at the Tower of St. Mark to a group of distinguished Venetians. Few days later Galileo showed the instrument to the Signoria and to the Senate. Antonio Priu ...
... Let us now examine a contemporaneous report on Galileo’s telescope. On August 21, 1609, Galileo publicly displayed his newly improved telescope at the Tower of St. Mark to a group of distinguished Venetians. Few days later Galileo showed the instrument to the Signoria and to the Senate. Antonio Priu ...
Optical Specifications (Tech Report #35)
... This document is meant to de ne the error budgets for the fabrication and collimation of the optics for the converted MMT. Important background information can be found in a number of publications and technical memoranda; these are listed in section 10 below. In the case of a con ict between the ref ...
... This document is meant to de ne the error budgets for the fabrication and collimation of the optics for the converted MMT. Important background information can be found in a number of publications and technical memoranda; these are listed in section 10 below. In the case of a con ict between the ref ...
Mini-ASTROD: Mission Concept
... (ii) In orbit, the cylindrical axis is perpendicular to the orbit plane with the telescope pointing toward the ground laser station. The effective area to receive sunlight is about 5m2 and can generate over 500 W of power. (iii) The total mass of spacecraft is 300-350 kg. That of payload is 100- ...
... (ii) In orbit, the cylindrical axis is perpendicular to the orbit plane with the telescope pointing toward the ground laser station. The effective area to receive sunlight is about 5m2 and can generate over 500 W of power. (iii) The total mass of spacecraft is 300-350 kg. That of payload is 100- ...
ATACAMA LARGE MILLIMETER / SUBMILLIMETER ARRAY
... the first stars and galaxies, and directly image the formation of planets. ...
... the first stars and galaxies, and directly image the formation of planets. ...
Lens and Camera Arrays for Sky Surveys and Space Surveillance
... wide areas of the sky, and in many cases, over wide temporal windows. The camera lens-based instruments are inexpensive, therefore allowing astronomers to increase sensitivity by dedicating multiple apertures to monitoring the same part of the sky, or they use multiple apertures to simultaneously co ...
... wide areas of the sky, and in many cases, over wide temporal windows. The camera lens-based instruments are inexpensive, therefore allowing astronomers to increase sensitivity by dedicating multiple apertures to monitoring the same part of the sky, or they use multiple apertures to simultaneously co ...
New Horizons Mission Design - SwRI Boulder
... infeasible to consider any indirect JGA trajectories. On the other hand, the use of Radioisotope Thermoelectric Generator (RTG) as the onboard power supply also disfavors the indirect JGA trajectories that would include an Earth flyby. ...
... infeasible to consider any indirect JGA trajectories. On the other hand, the use of Radioisotope Thermoelectric Generator (RTG) as the onboard power supply also disfavors the indirect JGA trajectories that would include an Earth flyby. ...
Nano-Accuracy Surface Figure Metrology of Precision Optics
... accuracy conventional optics. These manufacturing techniques have enabled the fabrication of nano-radian and nanometer accuracy components required in various applications. Several recently-developed metrology techniques extend the measurement capabilities of conventional interferometers. Liu, et al ...
... accuracy conventional optics. These manufacturing techniques have enabled the fabrication of nano-radian and nanometer accuracy components required in various applications. Several recently-developed metrology techniques extend the measurement capabilities of conventional interferometers. Liu, et al ...
1e 1048.1−5937, xte j1810−197 and 4u 0142+61
... detected emission feature is at an energy of ≈13 keV. In the magnetar model the common interpretation is that these lines are proton-cyclotron in origin, implying a magnetic field of ≈2 × 1015 G. The major challenge with this view is that since all three sources show the line at the same energy, the ...
... detected emission feature is at an energy of ≈13 keV. In the magnetar model the common interpretation is that these lines are proton-cyclotron in origin, implying a magnetic field of ≈2 × 1015 G. The major challenge with this view is that since all three sources show the line at the same energy, the ...
optimizing the performance of as-manufactured grazing incidence x
... Figure 3-4. Comparison of the HPR of the aerial PSF, the RDPSF, and the AUDPSF of a near-aplanatic grazing incidence X-ray telescope with a despaced focal plane. ......42 Figure 3-5. (a) Illustration of the HPR vs. field angle of the AUDPSF for a variety of focal plane despace values, (b) HPRfwa vs. ...
... Figure 3-4. Comparison of the HPR of the aerial PSF, the RDPSF, and the AUDPSF of a near-aplanatic grazing incidence X-ray telescope with a despaced focal plane. ......42 Figure 3-5. (a) Illustration of the HPR vs. field angle of the AUDPSF for a variety of focal plane despace values, (b) HPRfwa vs. ...
PPT - University of Waterloo
... Herschel: The Instruments • SPIRE: simultaneously imaging at 250, 350, 500 μm with 322, 242, and 162 pixels in same 4'x4' FOV or low to medium resolution spectroscopy in 2'x2' • PACS: spectroscopy with velocity resolution of 100-250 km/s and 1300-3000 km/s coverage or imaging with two 25x16 arrays ...
... Herschel: The Instruments • SPIRE: simultaneously imaging at 250, 350, 500 μm with 322, 242, and 162 pixels in same 4'x4' FOV or low to medium resolution spectroscopy in 2'x2' • PACS: spectroscopy with velocity resolution of 100-250 km/s and 1300-3000 km/s coverage or imaging with two 25x16 arrays ...
Long-term monitoring of the short period SU UMa
... seconds. The read-out time was typically a few seconds. ...
... seconds. The read-out time was typically a few seconds. ...
Document
... the lecture, to resolve areas which seem confusing • From time to time I will give small “Reading Quizzes” at the start of a class, where I ask three questions that ...
... the lecture, to resolve areas which seem confusing • From time to time I will give small “Reading Quizzes” at the start of a class, where I ask three questions that ...
LSST and Dark Energy - University of Washington
... Each optic has 6 dof (decenter, defocus, three euler angles) Perturbations are placed on the three mirrors using a Zernike expansion to simulate the possible residual control system errors each mirror can have an arbitrary amplitude code goes up to 5th order polynomials ...
... Each optic has 6 dof (decenter, defocus, three euler angles) Perturbations are placed on the three mirrors using a Zernike expansion to simulate the possible residual control system errors each mirror can have an arbitrary amplitude code goes up to 5th order polynomials ...
Document
... First views of solar ejected clouds impacting the Earth UK involvement: (i) Novel CCD camera systems on all remote sensing systems aboard the spacecraft; (ii) Leadership of the unique Heliospheric Imager instrument, a wide-angle telescope system, to image solar clouds in interplanetary space ...
... First views of solar ejected clouds impacting the Earth UK involvement: (i) Novel CCD camera systems on all remote sensing systems aboard the spacecraft; (ii) Leadership of the unique Heliospheric Imager instrument, a wide-angle telescope system, to image solar clouds in interplanetary space ...
Status of mirror segment production for the Giant Magellan Telescope
... segment’s center of curvature with R = 36 m. The interferometer and additional null optics (at least a CGH) are therefore located between the segment and the fold sphere, and their supporting structure will create obscuration in the test. Furthermore we require a near-simultaneous interferometric te ...
... segment’s center of curvature with R = 36 m. The interferometer and additional null optics (at least a CGH) are therefore located between the segment and the fold sphere, and their supporting structure will create obscuration in the test. Furthermore we require a near-simultaneous interferometric te ...
burrows_liverpool2012
... continues to be highly variable, with dramatic dips in the X-ray count rate at increasing intervals. The source is still quite bright, with isotropic luminosities of ~ 1045 ergs/s. Overall decay rate is about t-4/3. ...
... continues to be highly variable, with dramatic dips in the X-ray count rate at increasing intervals. The source is still quite bright, with isotropic luminosities of ~ 1045 ergs/s. Overall decay rate is about t-4/3. ...
The Search for Directed Intelligence
... In all of these cases the fact that the laser linewidth (bandwidth) is extremely narrow (from kHz to GHz depending on the laser design) and the field of view is extremely narrow, mitigates these effects which would otherwise be overwhelming for a broadband photometric band survey. Heterodyning is al ...
... In all of these cases the fact that the laser linewidth (bandwidth) is extremely narrow (from kHz to GHz depending on the laser design) and the field of view is extremely narrow, mitigates these effects which would otherwise be overwhelming for a broadband photometric band survey. Heterodyning is al ...
XMM-Newton
The XMM-Newton, also known as the X-ray Multi-Mirror Mission and the High Throughput X-ray Spectroscopy Mission, is an orbiting X-ray observatory launched by ESA in December 1999 on an Ariane 5 rocket. It is named in honor of Sir Isaac Newton. The telescope was placed in a very eccentric 48 hour elliptical orbit at 40°; at its apogee it is nearly 114,000 kilometres (71,000 mi) from Earth, while the perigee is only 7,000 kilometres (4,300 mi).