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How Cell Site Analysis Defence Works


Cell Site Analysis in action

cell site investigation for defence solicitorsInitial review of prosecution’s Cell Site Analysis

The defence team will instruct an expert in Cell Site Analysis, to review the prosecution’s Cell Site report. This review will;

  •  Verify the accuracy of maps and field strength survey charts.
  • Check for errors in any documentation submitted.
  • Authenticate the examination methodology.
  • Endorse the equipment used in the analysis.

Once the Cell Site Review has been undertaken,in order to fulfill the obligations of the defence counsel, it will be necessary to re-examine some or all of the cell site analysis work. This is done to ensure that the original readings are accurate as an incorrect reading could mean that the suspect has been attributed to a place that he or she wasn’t. The examination aspect is conducted utilising the same methodology used for a full re-examination (see below).

Cell Site Analysis Re-Examination/Examination

The analysis is generally conducted in one of two ways:

Travelling to each location of interest highlighted by the prosecution and taking measurements to determine the best serving cell or cells with respect to each specific location. This is known as a Spot Report.

Travelling in and around the area covered by a particular cell to determine the overall coverage. This is known as a Full Coverage Report. The Full Coverage Report frequently involves numerous hours of cell site readings, depending on the geographic area covered by the cell. It should be noted that cells located in city centres generally will cover a smaller area than those located in rural areas.

Both Spot Report and Full Coverage Reporting methods provide a validated indication to the coverage of the cell, however, a Full Coverage Report can geographically be represented on a map to show the extent of coverage with the most probable areas or locations where the call is most likely to have been connected.

Spot Reports will only show the coverage measured at specific locations, and does not represent other areas where a call may have connected. Each case has to be determined as to which is the appropriate examination is to be used.

The specialist network equipment used to conduct these measurements is essentially a mobile phone enabled with specialised software and a GPS system which is installed within a vehicle. This bespoke equipment will allow the user to monitor, or if necessary adapt, the way in which a mobile phone responds to the network. This bespoke equipment is also connected to a GPS system which can record the precise location where each measurement is taken.

All the measurements recorded by the Cell Site Analysis Expert are then complied in to logfiles, which are then analysed back at the laboratory. The analysis of this data is manually undertaken and is often very time consuming. The data is then plotted onto ordinance survey maps to show which cells provide coverage with respect to a single location, or the full coverage plots.

The results of the readings are used to compile a new report. The new report is then analysed against those from the prosecution’s report, to ascertain if there are any discrepancies. If any discrepancies are found, they assist in the defence by discrediting the prosecution’s evidence or if its inaccurate, the prosecution’s evidence/case is likely to be thrown out.

All findings are complied in a clear and concise report with associated ordinance survey maps of varying scales, to visually represent locations of interest and cell coverage.

Cell Site Analysis defence: Why do we need this?

Cell Site Analysis is predominantly used by prosecution to prove the whereabouts of a mobile phone at a particular date and time.

It is important to note that Cell Site Analysis only proves where the phone was, not the user. Further analysis is required to ascertain if the phone was in the possession of the suspect by examining activity such as texting, phone calls, browsing and app usage.

Disklabs has a team of Cell Site Analysis experts ready to support you. Our commitment to all-in pricing, wherever possible, means that we avoid hidden extras as the trial process continues.

Call us on +44(0)1827 50000 or use our contact form to let us know your requirements today.


Disklabs – comprehensive cell site analysis for defence counsels

Top Ten Unusual Requests for Data Recovery – No.3


Data Recovery Hit Parade

restored data from broken disk driveNumber 3 in Disklabs countdown of odd request for data recovery from laptop computers.

“It didn’t survive 40mph along the tarmac”

Sadly leaving laptops on the roof of cars and then driving off is a common problem.  In the case various laws of physics relating to gravity, inertia, friction and deceleration came into play.  Our client said that he had reached 40 mph before the laptop actual left the roof of the car.  Needless to say this isn’t good for any part of the machine including the disk drive.

Fortunately our team of experts were able to recover almost all of the business data stored on it.

Call us today on +44(0)1827 50000 or use our contact form if you have a problem with a computer disk drive, a phone or a tablet.


Disklabs – We remarket legacy computer equipment


Application of Sat Nav Forensics


Satellite Navigation

benefits sat nav forensicsSatellite Navigation, often known as Sat-Nav, Sat Nav, SatNav, GPS Nav, GPS-Nav, or GPSnav is used commonly as a route finder on all forms of transport.

Standard Sat Nav is used in vehicles to give drivers directions and provide accurate route analysis, and by people who walk, run or orienteer. Marine Sat Nav is used to help ship steer accurately while Aircraft GPS is the form of Sat Nav used to accurately pinpoint the position and direction of aircraft.

Originally developed for military use Sat Nav devices are now commonly used by the general public and available in a wide range of devices and applications.  The use of Satellite Navigation systems in cars (either as a standard item of equipment or a portable device) naturally provides the greatest opportunity for accessing useful data.

Most Satellite Navigation systems have  management software and a variety of logs and configuration files that can be examined and broken down into readable and understandable data. Examination and interpretation of this data enables Disklabs’ Sat Nav Forensics experts to identify requested destinations, directions given to drivers and journey times. This information is naturally of great interest to law enforcement officers, defence lawyers, or employers for instance. Importantly it can be treated as admissible evidence in criminal and civil cases, provided appropriate evidence gathering rules have been followed.

Benefits of Sat Nav forensics

Law Enforcement Officers.

The police, or other law enforcement agencies, may be able to exactly pinpoint the position of an accused person if that person used a Satellite Navigation system. If an accused person states that he was in one place, but his car Satellite Navigation system states that at the time that the vehicle was 200 miles away, the information given adds to the intelligence that the law enforcement agency has against the accused, or is even enough to charge the said accused person.


The prosecutors often work alongside the law enforcement agencies, and as such will use the information gained in Satellite Navigation forensics in the same way.

Defence Lawyers.

Defence lawyers are there to examine any and all evidence and try and pick flaws in it. If a law enforcement agency has not yet examined the Satellite Navigation system, the evidence produced may well be enough to have the accused proved innocent or cast doubt over his guilt. It is this reason that the more and more defence lawyers are turning to Satellite Navigation Forensics.


Subject to the company handbook, the employees contract, and the company acceptable usage policy, (AUP), the employer may have the right to examine the Satellite Navigation systems of its mobile employees. This service is being used as employees want to know that their staff are indeed using their working hours efficiently. They may also use this service if they believe that the employee is not being as honest with their work details as they perhaps should.

Disklabs has a team of digital forensics experts who can analyse a wide variety of electronic devices, including Satellite Navigation systems, for criminal, civil and corporate investigations.

Call us on +44(0)1827 50000 or use our contact form to let us know your requirements.

How Mobile Phone Masts Work


Masts, antennae and base stations

Mobile phone mastStrictly speaking a mast is just that, a tower or pole that sticks up into the air – usually 15m.  The parts that actually enable us to send and receive calls are separate elements; antennaes and radio base stations.  The mast itself simply lifts the antennae to height where they can transmit and receive radio waves.

When you make a call your phone converts voice or data into radio waves that are transmitted to the nearest base station.  The base station determines if the call is to another mobile phone or to a landline and routes the call accordingly.  If it is to someone on the same network then the call can be directed via base stations to the site closest to the recipient and transmitted via the antennae.

The role of Cells
The mobile phone network operates on the cell principle.  The network operators divide a territory up into thousands (in the case of the UK) of discrete areas – cells – that contain a base station and antennae, plus a mast if required.  Each cell provides coverage for a specific area and because their coverage overlaps calls can be passed between cells as people move around.

Cell density and positioning are driven by population distribution and topography.  There are more cells in urban area to cater for higher traffic levels and, sometimes, to mitigate interference caused by tall buildings.  Low power cells called “picocells” can also be deployed inside buildings such as airports where there is a high concentration of users.

Cell Site Analysis
How mobile networks work and the way in which they are configured are extremely important to Disklabs. We need to understand the coverage of the mobile networks in precise detail when conducting Cell Site Analysis, a technique for identifying the movement and use of mobile phones and communications devices.  Details about height of masts, local geography and cell types can mean the difference between a guilty or not guilty verdict, or whether a suspect is apprehended.

Visit the website for more information on Disklabs range of digital forensics and data recovery services or contact us today.

Call us on +44(0)1827 50000 or use our contact form to let us know your requirements.



Top Ten Unusual Requests for Data Recovery – No.4


Data Recovery Hit Parade

restore data from damaged laptop disk driveNumber 4 in Disklabs countdown of odd request for data recovery from laptop computers.

“Our cat peed on my laptop”

The fact that the feline in question was a pedigree Persian Blue didn’t make any difference.  The encroachment of liquid into the computer didn’t do it any good.  Fortunately the disk drive in the laptop wasn’t damaged inn the process and, for once, it was a very straight forward job to access data and save the client’s data.

Call us today on +44(0)1827 50000 or use our contact form if you need help restoring important or confidential data from your electronic equipment.


Disklabs – Computer forensics for civil and criminal cases