HISTORICAL ARCHIVING  
FIELD DETECTING  
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   The EMSA pulse prospection explained
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How and what are we looking for? The detection of decomposed or partially decomposed organic material is performed by a non-invasive analysis, using the “dual mirror principal”, the enantiomers appearing during the release of the amino acids from the proteins in the state of decomposition. A procedure dated from the 1970’s, but complied to the use of polarized light of the nano-spectrum. This procedure didn’t offer a non-invasive way of detection. A simular analysis, but executed within the polarized electromagnetic and groundpenetrating spectrum, was found experimentally after many hours of “trial & error” supported by a private project from the HBFV Museum. The War Heritage Detection Program started by the research towards gravesites of horses from the First World War.   This procedure applies mainly to the residual processes and combined residues by humain or animal origin, but also the influence of their decomposition to the matrix in which they are located and the cohesion within the composition itself. ( infiltration of water, animal excretion, ... ) The enantiomers of the chemical structures emerging during the process, are refered to an oscillating and polarized magnetic field, equal to the mirrorfrequency of the “laevo-enantiomers”, the L- amino acids present in the living proteins. They are of a constant value and measurable within the spectrum generated by the influence of the polarized electrmagnetic waves. During decomposition, the L-amino acids will transfer into “dextro-enantiomers”, also called D-amoni acids. A gradually proces, ending in a solid value. Through the EMSA the difference is measured within the generated electromagnetic spectrum, between the calibrated mirrorfrequencies and the reflected values after the penetration of the soil or matrix.   How the system works The generated field, we call the L-pulse, in analogy with the laevo-enantiomers, tuned as a low frequency polarized mirrorplatform ( normalisation ). The received and reflectected field, we call the D-pulse, in analogy of the dextro-enantimers, by the use a the horizontal bi-pole. The difference between the values is the algorithm of the detection platform. An important condition for a reliable EMSA survey, is a preliminary determination of the consistant resistivity profile of the matrix on the whole of the site. A maxiumum of 15% fluctuation is allowed. Highly disturbed matrix and chemical pollution render the detection to be invalid ( matrixblocker ). Highly mineralised matrix in which the dextro-enantimers reached their final stage of stabilising, is found to be a less reliable carrier. Therefor, this environment is considered as a partially unreliable carrier ( partial matrixblocker ). Every case of partial matrixblocker needs individual analysis to proceed. An EMSA detection without these preliminary researches is non reliable and considered worthless. The polarisation of the L-puls is generated bij a custom 90° X-Y platform, consisting of two omni-directional coils. The oscillating power is based upon a manipulated sinuswave, converted to a transvers X-Y platform emitting the signal. The lowfrequent penetration capacity offers a wide spectrum, offering the possibilty to work a wide range of soil compositions ( except matrixblockers ) and a wide grid of mirrorfrequencies.
The reflected D-pulse can be interpreted in two ways : Real-time audio output: immediate marking during the project Prospection: survey of preliminary research for mapping and GPS logging. De receiver unit consists of a syncronisation link ( up and downlink by the VFC of the pulsegenerator ) and a compact lateral and horizontal bipole. Crossing the bipole antennas neutralises the amplification of the received signal to a -30Db value : this way, during a real-time logging,  even a weak D-pulse reflection stands out against the L-pulse. The low emission power makes the L-pulse mirrorfrequency appliable globaly.
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Advantages : - The EMSA prospection or real-time detection offers in many ways a basic structure between the primary and secondary context. Disturbance of the matrix towards the secondary fase by cultural of natural formation, can be relayed to the initial primary fase, by the indication of the original L to D transfer. The presence of the primary “corpus of decay” is not needed. - Global detection of features and influences on a site, linked to organic decomposition ( early middle age foundations consisting of a mix of sand, stones and horsemenure/urine - decomposition of parasites in woodstructures, ... ) - Stratification with organic components becomes visible, including cultural formation ( for example organic dumps, unknown burrial sites, ... ) - Coherent with GPR and tomography for site mapping.
Typical field arrangement of the EMSA : the mobile pulse generator with the L-shaped dual coil antenna, during the groundbalancing of the receiving unit ( is performed at the start of every survey ).
Indication with the EMSA of a D-marker, just outsite the trench on the archeological site at a Waterloo project. The real-time detection prohibited the feature from being missed.
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  During the prospection on a private site in Halen, at the location where the rear defense line of the 2nd Guides Brigade was on August 12, 1914 - a trial pit was dug out according to our indication. The remains became visible. We used the pulsegenerator below the frequency of 1.7kHz, due to the heavy clay ground.