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--- gp_simulator:operation_manual [2019/02/27 11:28]
yasko
+++ gp_simulator:operation_manual [2019/02/27 12:18] (current)
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-==Time shift tab==
+==Time Shift Tab==
-Here you can shift the 1PPS or timestamp of the DUT in different ways.
+In the "Time shift" tab, you can shift the 1PPS or timestamp of the DUT in different ways.
 \\
-{{:gp_simulator:gp-simulator_time_shift_controls.png|}}\\
-  * Current 1PPS offset, s - Adds an offset to the generated sequence in such a way as to shift the 1PPS signal of the DUT.
+{{:gp_simulator:gp-simulator_time_shift_controls.png|}}
-  * Current GPS Time of week offset, s - Dramatically changes the ToW in HOW in all subframes. The position of all satellites is recalculated based on the new time. Thus, the receiver is temporarily lost tracking the satellites. Make sure that the power level of the generated signal is sufficient to block the real signals.
+\\
-  * Sats clock corr offset, s - Sinhronius simulates clock drift on all satellites. Leads to a smooth drift of 1PPS impulse of the DUT
-==DUT movement==
+  * **Current 1PPS offset, s** - Adds an offset to the generated sequence in the way that it shifts the 1PPS signal of the DUT;
+  * **Current GPS Time of week offset, s** - Dramatically changes the ToW in HOW in all subframes. The position of all satellites is recalculated based on the new time. Thus, the receiver temporarily stops tracking the satellites. Make sure that the power level of the generated signal is sufficient enough to block the real signals;
+  * **Sats clock corr offset, s** - Synchronously simulates clock drift on all satellites. Leads to a smooth drift of the DUT 1PPS impulse.
+\\
+==DUT Movement Tab==
+In the "DUT movement" tab, you can move the coordinates of the DUT for a certain number of meters for a certain time period.
+\\
 {{:gp_simulator:gp-simulator_dut_movement_controls.png|}}\\
-Here you can move the coordinates of the DUT for a certain number of meters for a certain time
-==DUT ECEF impairment==
+\\
+==DUT ECEF Impairment Tab==
+This tab is experimental. In the "DUT ECEF impairment" tab, can you add a fixed offset and noise to the coordinates of the DUT and noise to the Doppler offset. You can also set the "Mean" value and the standard deviation (STD) of the noise.
+\\
 {{:gp_simulator:gp-simulator_dut_ecef_impairment_controls.png|}}\\
-This is the experimental tab. Where can you add an fixed offset and noise to the coordinates of the DUT and the noise to Doppler offset. You can set the mean value and the standard deviation of the noise.
-==Satellites  impairment==
+\\
+==Satellites  Impairment Tab==
+In the "Satellites  impairment" tab, you can set the relative power, pseudorange offset and Doppler offset for each satellite.
+\\
 {{:gp_simulator:gp-simulator_satellites_impairment_controls.png|}}\\
-On this tab you can set the relative power, pseudorange offset and Doppler offset for each satellite.
+\\
 ====Conducted testing====
-Below is a typical DUT testing diagram for valuentabilities to spoofing and jamming:\\
+Below is displayed the diagram of typical DUT testing for vulnerabilities to spoofing and jamming.\\
 {{:gp_simulator:gp-simulator_conducted_testing.png?600}}
 \\
-We recommend using a directional coupler to suspend the signal from the simulator to the real signal. Oscilloscope is used for measurement of 1PPS impulse offset.
+We recommend using a directional coupler for injecting the simulated signal into the real one. Oscilloscope is used for measuring 1PPS impulse offset.
-==Application settings==
+\\
-Wait for the UBLOX M8T status to become 3D Fix. Download almanac and ephemeris files. On USRP folder set:
-  * 10 MHz Ref to GPSDO
+==Application Settings==
-  * check Conducted Connection
+First, wait for the "UBLOX M8T" status to display "3D Fix." Then, sownload almanac and ephemeris files.
-  * Set Attenuator value based on cables, attenuators and directional coupler.
+\\
-On Start folder setup
-  * DUT input power. Usualy it is within -100 dBm
+After that, set the following in the "USRP" tab:
-  * Push Start button
+  * **10 MHz Ref** to **GPSDO**;
-====Radiated testing====
+  * Check the "Conducted Connection" box;
+  * Set the "Attenuator" value based on cables, attenuators and the directional coupler.
+In the "Start: folder setup
+  * DUT input power. Usually it is within the  "-100 dBm" range;
+  * Click on the "Start" button.
+\\
+====Radiated Testing====
 <WRAP left round info 60%>
-Attention.
+**NOTE**: The use of radiated radio signals may be illegal in your country. Please familiarize yourself with your local legal laws on the regulation of the radio spectrum before using this app.
-The use of radiated radio signals may be illegal in your country. Please familiarize yourself with your legislation on the regulation of the radio spectrum before using this app.
 We are not responsible for your actions.
-</WRAP>\\
+</WRAP>
-\\
 \\
 \\
 \\
 \\
-Below is a typical scheme of using our equipment for field testing of devices for exposure to GPS spoofing:\\
+Below is displayed the diagram of a typical use case of our equipment for field testing vulnerability of various devices to GPS spoofing exposure.\\
 {{:gp_simulator:gp-simulator_radiated_testing.png?1000|}}\\
 \\
-In case of radiated testing you cann't use internal USRP GPSDO like 10 MHz reference source, because it will be spoofed. You have to use external high quality reference source. Frequency stability should be better than 25 ppb.\\
-==Application settings==
+In the case of radiated testing, you cannot use internal USRP GPSDO as a "10 MHz" reference source, because it will be spoofed. Thus, you should use external high quality reference source. The frequency stability should be better than "**25 ppb**."\\
-Wait for the UBLOX M8T status to become 3D Fix. Download almanac and ephemeris files. On USRP folder set:
-  * 10 MHz Ref to External
+==Application Settings==
-  * uncheck Conducted Connection
+First, wait for the "UBLOX M8T" status to display "3D Fix." After that, download almanac and ephemeris files.
-  * Set Amplifier Gain, Attenuator, Anteanna Gain according to your connected equipment.
+\\
-On DUT folder setup:
-  * direction to the DUT
+In the "USRP" tab, set the following:
-  * and known distances
+  * **10 MHz Ref** to **External**;
-On Start folder setup
+  * Uncheck the "Conducted Connection" box;
-  * DUT input power. Usualy it is within -100 dBm
+  * Set "Amplifier Gain," "Attenuator," and "Antenna Gain" according to your connected equipment.
-  * Push Start button
+In the "DUT" tab, set the following:
+  * **Direction** to **DUT**;
+  * and known distances.
+In the "Start" tab, set up the following:
+  * DUT input power that is usually it is within the "-100 dBm" range;
+  * Click on the "Start" button.
+\\
 ====Synchronous and asynchronous mode====
 In the case of an asynchronous attack, a spoofer transmits false signals that are stronger than the original ones, causing the receiver to lose track of the satellites and lock on to the overpowering spoofing signal(s). On the other hand, synchronous attacks imply transmitting signals that are synchronized with the original ones and then gradually overpowering the latter.\\
-In more detail, the differences are synchronous and asynchronous attack you can read in our [[https://gpspatron.com/chapter-1-asynchronous-spoofing-attacks/|article]].\\
+You can learn more about the difference between synchronous and asynchronous attacks in our dedicated article on [[https://gpspatron.com/chapter-1-asynchronous-spoofing-attacks/|this page]].
-In synchronous mode, our simulator generates a signal that is aligned with real up to 100 ns.\\
+\\
-The selection of the spoofing mode can be made in the USRP tab:\\
+In the "Synchronous" mode, our simulator generates a signal that is aligned with the real one up to "100 ns." To select a particular spoofing mode, go to the "USRP" tab.
+\\
 {{:gp_simulator:gp-simulator_spoofing_mode_selection.png|}}\\
 \\
-If you selected the synchronous mode, then you can set an additional offset for the start of generation. This is convenient for examining the DUT correlation analysis window.\\
+If you select the "Synchronous" mode, then you can set an additional offset for the start of the generation. This is convenient for examining the DUT correlation analysis window.\\
+\\
+To work in the "Synchronous" mode, you need to wait for the following flag: "GPS Locked":
 \\
-To work in synchronous mode, you must wait for the flag: "GPS Locked":\\
 {{:gp_simulator:gp-simulator_gpsdo_locked_flag.png|}}\\
 \\
-In synchronous mode, the generation does not start immediately, but only at a certain time:\\
+In the "Synchronous" mode, the generation does not start immediately, but only at a particular time:
+\\
 {{:gp_simulator:gp-simulator_start_time.png|}}