These elements were inserted inside two PVC tubes, which allow the whole set to be handled and moved without any relevant optical disturbances.The upper part of the tube is covered by 1-mm-thick float glass and with the same diameter as the tube, in order to correctly fit and being sealed with a special silicon cord for glass and exterior.Meteor spectra studies started in the 1860s by means of the observations taken by A. Broad spectroscopy programmes were carried out in USA, Canada, the former USSR and Czechoslovakia (Ceplecha et al. New video techniques to study meteor spectra started to be used in the early 1970s (Hemenway et al.1971), as well as new methods and TV processes for data reduction, described by Millman and Clifton (1975), Borovicka and Bocek (1995) and Zender et al. Meteor spectroscopy is based on the emission of atomic lines (emission spectra), along with other molecular bands and continuous radiation.For each of the two spectrographs, the resulting block (CCD case adapter objective grating) was then inserted inside two concentric polyvinyl chloride (PVC) tubes.These tubes are covered at their upper end with a special glass, perfectly sealed with a silicone elastomer, which allows both waterproofing and preventing temperature differences from impairing the connection joint (Fig. The spectrographs are located in an automatic enclosure system, which serves as support and protection.The existing spectrographic equipment we have developed is located at the Andalusian Astronomical Observatory (37°24′54″N, 3º57′12″W), a dark location at 1030 m above the sea level, in south Spain (close to the Alcalá la Real village).The equipment has been connected to a weather station that regulates the proper functioning of the spectrographs.
Light emitted by meteors during the ablation process in the terrestrial atmosphere allows us to study, by means of spectrographs, the chemical nature of their parent bodies.
Thus, the analysis of the spectrum of a given meteor can provide distinct information about the plasm, the ablation process and the chemical composition of the meteoroid (Borovička 1993, 1994a; Trigo-Rodríguez et al.
2003) and even relevant information about its parent body.
The combination of these images allows to capture the complete fireball phenomenon and obtain precise details thereof.
The two spectrographs have the same design, but different size.Moreover, all the devices that form this system can be controlled at distance and programmed in advance.