1 / 5

Observations

Observations. Passive: Natural Signals Photographs Semi-Passive: Artificial Signals GPS receiver Active: Signals Controlled by Observers Radar Echo, Laser Ranging. Passive Observations. Astrographs: 2-dim. Angles Photographic Plates, CCD Arrays, VTR

ailish
Download Presentation

Observations

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Observations • Passive: Natural Signals • Photographs • Semi-Passive: Artificial Signals • GPS receiver • Active: Signals Controlled by Observers • Radar Echo, Laser Ranging

  2. Passive Observations • Astrographs: 2-dim. Angles • Photographic Plates, CCD Arrays, VTR • Transit, Meridian Circle: 1-dim. Angle • Interferometry: Precise 1-dim. Angle • VLBI, Optical/IR Int., X-ray • Ground-based vs Orbital platform

  3. Passive Observations (Cont.) • Detectors: Arrival Time, Energy • Photo-Multiplier Tube, Photo-Diode, CCD, Chamber • Clocks: Event Time • Eclipse, Occultation, Pulse, Light Curve, Rise/Decay Pattern • Doppler: Radial Velocity • Spectrograph, Emission/Absorption Lines

  4. Semi-Passive Observations • Doppler • Up/Down Link to Satellites/Space Vehicles • Integrated Doppler • NNSS, DORIS/PRARE • Semi-Passive VLBI • ALSEP, RISE • Time Difference • GPS, GLONASS

  5. Active Observations • Radar Bombing • Mercury, Venus, Mars, Asteroids • Range and Range Rate (R&RR) • Artificial Satellites, Space Vehicles • Radio Transponder • Laser Ranging • Satellite, Moon

More Related