The identification and detection of energetic materials has become a major issue of dual research, both civil and military, for the safety of populations. An important area of ??research in this context is the ability to measure, with the least uncertainty, a set of spectral signatures characterizing explosives or suspicious materials at remote distance. Constructing a prototype instrument for this purpose assumes that it can emit radiation operating in an appropriate spectral range at intensities sufficiently high to interact with the material and to collect the scattered field away from the emitting source. We propose here to deepen the technique of identification by terahertz spectroscopy (THz) of military explosives as well as simulating products. THz waves offer a great selectivity on molecular transitions and many "fingerprints" of explosives belong to this spectral domain. With the new power laser sources available today, their remote identification can become operational in the short term. The ANR / ASTRID project ALTESSE 1 (2015 - 2018) revealed the rich potential of a time-resolved THz spectroscopy using an air plasma formed by two-color femtosecond laser pulses based on the coherent detection of THz radiations issued from a target. Major scientific and technological breakthroughs have been achieved, such as proof of feasibility of a direct THz spectroscopy of explosives at a distance of 15 meters from the laser source, or the measurements of numerous lines of absorption of energetic materials populating the THz region up to the mean infrared ( 10 m in filamentation regime controlled by means of adaptative optics (IO). The first 18 months of the project will be dedicated to laboratory studies in order to increase the emissivity potential of air plasmas in the THz domain. The last 18 months will be devoted to experiments aimed at making reliable THz spectroscopy at remote distances. The success of this project should pave the way for building a demonstrator.