Geometrics Forum - Recent Posts

How to download or delete raw data from MagStation micro-SD card

Rui Zhang — Wed, 22 Apr 2026 00:27:28 +0000

1. Establish WIFI connection between your PC and the MagStation.

2. Open a web browser and type in http://192.168.1.1/supporttools.htm.

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3. Click "Delete project storage" or "Download survey data" to delete or down raw data from micro-SD card. We recommend deleting raw data files after 700 hours data collection.

4. The downloaded survey data is in .magdata format. To convert it to CSV, open Survey Manager and create a new MagStation project. Inside the project, create a new survey. Select the survey name, click "Import Data" and then choose the .magdata file. After successful import, click "Export CSV".

Why does my mobile device sometimes disconnect from instrument WIFI?

Rui Zhang — Tue, 21 Apr 2026 19:38:13 +0000

Geometrics instruments, such as G-864, MagEx, MagArrow, MagStation et al, communicate with a mobile device via WIFI. But because the instrument WIFI has NO internet access, some Android device, after connecting to the instrument for a while, will automatically start searching for another WIFI access point. To prevent this from happening, when the No Internet Access warning window pops up after first WiFi connection, choose "Tap for options". On the following window, check the “Don’t ask again for this network” box and press “Yes” .

RE: Geometrics preliminary MagArrow and MagEx data processing program download

Sotheavy Lok — Fri, 03 Apr 2026 12:41:30 +0000

I got it . it's worked now.

RE: Geometrics preliminary MagArrow and MagEx data processing program download

Sotheavy Lok — Fri, 03 Apr 2026 11:54:39 +0000

The zipped files can be downloaded here:

-- attachment is not available --

After unzip, please keep all files and folders!

Before you run the program, please download and install the LabView Runtime (free, 64-bit 2020 SP1) first:
https://www.ni.com/en-us/support/downloads/software-products/download.labview-runtime.html#369642

The user guide is located in the folder.

It is worth mentioning that the data processing program provides 2 methods of suppressing the survey noise:
1. Through frequency filtering and line levelling (Survey Data Noise Reduction).
2. Heading effect compensation (Heading Error Compensation).

In general, to perform the heading error compensation, you need to collect heading effect calibration data (Instruction included in the folder).
It is possible that the calibration data can be obtained from the survey data itself.
If you have trouble processing your data, please share some of your data with Geometrics and we can provide help, especially in generating the calibration file.

If the trial version expires, please replace the configuration file inside the Config Files folder with the new one below:

-- attachment is not available --

RE: Teensy 4.1 with MFAM

Rui Zhang — Wed, 25 Mar 2026 18:31:16 +0000

Nice work! Thanks for sharing!

Teensy 4.1 with MFAM

Roi Granot — Wed, 25 Mar 2026 09:21:36 +0000

Hi All,

We are using the Teensy 4.1 as a logger (Adafruit GPS is linked with the Teensy) for the MFAM SX. Below is the code for the Arduino IDE (Teensy), for people who might find it useful,

Roi

#include

// ---- NETWORK CONFIGURATION ----

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };

IPAddress ip(192, 168, 2, 10);

IPAddress mfamIP(192, 168, 2, 2);

uint16_t mfamPort = 1000;

EthernetClient client;

// ---- PACKET STRUCTURE ----

const int PACKET_SIZE = 1380;

const int SAMPLE_SIZE = 32;

const int HEADER_SIZE = 16;

const int NUM_SAMPLES = 40;

const int SD_CHIP_SELECT = BUILTIN_SDCARD;

uint8_t buffer;

int bufferPos = 0;

// ---- SD CARD ----

File logFile;

bool sdReady = false;

unsigned long sampleCount = 0;

unsigned long fileStartTime = 0;

char filename;

// ---- AUXILIARY CHANNEL STORAGE ----

double gyroX = 0, gyroY = 0, gyroZ = 0, gyroT = 0;

double accelX = 0, accelY = 0, accelZ = 0, accelT = 0;

double compassX = 0, compassY = 0, compassZ = 0, compassT = 0;

// ---- GPS FROM ADAFRUIT MODULE ON SERIAL1 (Pin 0 = RX) ----

char gpsBuffer;

int gpsBufferPos = 0;

char gpsString = "";

char gpsDate = "00/00/00";

char gpsTime = "00:00:00.000";

bool gpsFix = false;

uint8_t tsStatus = 0;

// ---- OUTPUT CONTROL ----

// Set to 1 to log every sample, 10 for 100Hz, 20 for 50Hz, etc.

const int DOWNSAMPLE_FACTOR = 1; // 50 Hz output

int downsampleCounter = 0;

// How many minutes per file. Set to 10, 20, 60, etc.

const int FILE_MINUTES = 10;

// ---- LED INDICATOR ----

// Off = starting up

// Very slow blink (every 3 sec) = connected and logging

// Fast blink (4/sec) = connected but no data arriving

// Solid on = no SD card

// 3 quick flashes then pause = cannot connect to MFAM

const int LED_PIN = 13;

unsigned long lastBlinkTime = 0;

bool ledState = false;

unsigned long lastDataTime = 0;

// ---- FUNCTION PROTOTYPES ----

void createNewFile();

void parsePacket(uint8_t* pkt);

void parseAuxChannels(uint8_t* sample, uint16_t frameID);

void readGPS();

void parseGPRMC(char* sentence);

void writeSample(unsigned long timestamp, uint16_t fiducial, double mag1, uint16_t mag1s,

double mag2, uint16_t mag2s, uint16_t sysStatus);

int16_t toSigned16(uint16_t val);

void createNewFile() {

static int fileNumber = 0;

// On first call, find the next available file number

if (fileNumber == 0) {

char testName;

for (int i = 1; i <= 99999; i++) {

snprintf(testName, sizeof(testName), "MFAM_%05d.txt", i);

if (!SD.exists(testName)) {

fileNumber = i - 1; // Will be incremented below

break;

}

fileNumber++;

snprintf(filename, sizeof(filename), "MFAM_%05d.txt", fileNumber);

logFile = SD.open(filename, FILE_WRITE);

if (logFile) {

logFile.println("Mag 1,Mag 2,Fid,SysS,Mg1S,Mg2S,Gyro X,Gyro Y,Gyro Z,Gyro T,Accel X,Accel Y,Accel Z,Accel T,CompassX,CompassY,CompassZ,Comp T,Date,Time,TS Status,GPS");

logFile.flush();

fileStartTime = millis();

Serial.print("Logging to: ");

Serial.println(filename);

} else {

Serial.print("ERROR: Could not create ");

Serial.println(filename);

}

void setup() {

Serial.begin(115200);

delay(2000);

// Start GPS serial port (Adafruit Ultimate GPS defaults to 9600 baud)

Serial1.begin(9600);

pinMode(LED_PIN, OUTPUT);

digitalWrite(LED_PIN, LOW);

memset(gpsString, 0, sizeof(gpsString));

// Initialize SD card

if (SD.begin(SD_CHIP_SELECT)) {

sdReady = true;

Serial.println("SD card ready.");

} else {

Serial.println("WARNING: No SD card found. Serial output only.");

digitalWrite(LED_PIN, HIGH);

}

// Initialize Ethernet

Ethernet.begin(mac, ip);

if (Ethernet.hardwareStatus() == EthernetNoHardware) {

Serial.println("ERROR: No Ethernet hardware found!");

while (true) {}

}

Serial.print("Teensy IP: ");

Serial.println(Ethernet.localIP());

Serial.print("Connecting to MFAM at ");

Serial.print(mfamIP);

Serial.print(":");

Serial.println(mfamPort);

if (client.connect(mfamIP, mfamPort)) {

Serial.println("Connected to MFAM!");

} else {

Serial.println("Connection failed!");

}

Serial.println("Waiting for GPS fix...");

if (sdReady) {

createNewFile();

}

Serial.println("Mag 1,Mag 2,Fid,SysS,Mg1S,Mg2S,Gyro X,Gyro Y,Gyro Z,Gyro T,Accel X,Accel Y,Accel Z,Accel T,CompassX,CompassY,CompassZ,Comp T,Date,Time,TS Status,GPS");

}

void loop() {

// Always read GPS data from Serial1

readGPS();

if (!client.connected()) {

Serial.println("Disconnected. Reconnecting...");

if (sdReady && logFile) {

logFile.flush();

}

for (int i = 0; i < 3; i++) {

digitalWrite(LED_PIN, HIGH);

delay(100);

digitalWrite(LED_PIN, LOW);

delay(100);

}

delay(1400);

client.connect(mfamIP, mfamPort);

if (client.connected()) {

lastDataTime = millis();

}

return;

}

while (client.available()) {

buffer = client.read();

bufferPos++;

if (bufferPos >= PACKET_SIZE) {

parsePacket(buffer);

bufferPos = 0;

lastDataTime = millis();

}

// LED patterns

if (sdReady) {

if (millis() - lastDataTime > 3000) {

if (millis() - lastBlinkTime > 125) {

ledState = !ledState;

digitalWrite(LED_PIN, ledState ? HIGH : LOW);

lastBlinkTime = millis();

}

} else {

if (millis() - lastBlinkTime > 1500) {

ledState = !ledState;

digitalWrite(LED_PIN, ledState ? HIGH : LOW);

lastBlinkTime = millis();

}

// New file every FILE_MINUTES minutes

if (sdReady && logFile && (millis() - fileStartTime > (unsigned long)FILE_MINUTES * 60UL * 1000UL)) {

logFile.close();

createNewFile();

}

// ---- GPS READING FROM ADAFRUIT MODULE ON SERIAL1 ----

void readGPS() {

while (Serial1.available()) {

char c = Serial1.read();

if (c == '$') {

gpsBufferPos = 0;

}

if (gpsBufferPos < (int)sizeof(gpsBuffer) - 1) {

gpsBuffer = c;

gpsBufferPos++;

}

if (c == '\n' || c == '\r') {

gpsBuffer = '\0';

if (strncmp(gpsBuffer, "$GPRMC", 6) == 0 || strncmp(gpsBuffer, "$GNRMC", 6) == 0) {

// Save full sentence for logging

strncpy(gpsString, gpsBuffer, sizeof(gpsString) - 1);

gpsString = '\0';

// Remove trailing newline/carriage return

int slen = strlen(gpsString);

while (slen > 0 && (gpsString == '\n' || gpsString == '\r')) {

gpsString = '\0';

slen--;

}

parseGPRMC(gpsBuffer);

}

gpsBufferPos = 0;

}

void parseGPRMC(char* sentence) {

// $GPRMC,HHMMSS.sss,A,lat,N,lon,W,speed,course,DDMMYY,...

char copy;

strncpy(copy, sentence, sizeof(copy) - 1);

copy = '\0';

char* token = strtok(copy, ",");

int field = 0;

while (token != NULL && field < 10) {

switch (field) {

case 1: // Time

if (strlen(token) >= 6) {

snprintf(gpsTime, sizeof(gpsTime), "%c%c:%c%c:%s",

token, token, token, token, token + 4);

}

break;

case 2: // Fix status

gpsFix = (token == 'A');

break;

case 9: // Date

if (strlen(token) >= 6) {

snprintf(gpsDate, sizeof(gpsDate), "%c%c/%c%c/%c%c",

token, token, token, token, token, token);

}

break;

}

token = strtok(NULL, ",");

field++;

}

// Update GPS bits of tsStatus

tsStatus = (tsStatus & 0x0C); // Keep MFAM PPS bits (3,2)

tsStatus |= 0x01; // Bit 0: RMC sentence received

if (gpsFix) {

tsStatus |= 0x02; // Bit 1: GPS fix valid

}

// ---- MFAM DATA PARSING ----

int16_t toSigned16(uint16_t val) {

if (val > 32767) return (int16_t)(val - 65536);

return (int16_t)val;

}

void parseAuxChannels(uint8_t* sample, uint16_t frameID) {

uint8_t auxID = (frameID >> 11) & 0x07;

uint16_t aux0 = sample | (sample << 8);

uint16_t aux1 = sample | (sample << 8);

uint16_t aux2 = sample | (sample << 8);

uint16_t aux3 = sample | (sample << 8);

switch (auxID) {

case 1:

compassX = toSigned16(aux0) / 0.01333333;

compassY = toSigned16(aux1) / 0.01333333;

compassZ = toSigned16(aux2) / 0.01333333;

compassT = toSigned16(aux3) / 128.0 + 25.0;

break;

case 2:

gyroX = toSigned16(aux0) / 16.384;

gyroY = toSigned16(aux1) / 16.384;

gyroZ = toSigned16(aux2) / 16.384;

gyroT = toSigned16(aux3) / 512.0 + 23.0;

break;

case 4:

accelX = toSigned16(aux0) / 16384.0;

accelY = toSigned16(aux1) / 16384.0;

accelZ = toSigned16(aux2) / 16384.0;

accelT = toSigned16(aux3) / 512.0 + 23.0;

break;

default:

break;

}

void writeSample(unsigned long timestamp, uint16_t fiducial, double mag1, uint16_t mag1s,

double mag2, uint16_t mag2s, uint16_t sysStatus) {

char tsStr;

snprintf(tsStr, sizeof(tsStr), "%d%d%d%d%d%d%d%d",

(tsStatus >> 7) & 1, (tsStatus >> 6) & 1, (tsStatus >> 5) & 1, (tsStatus >> 4) & 1,

(tsStatus >> 3) & 1, (tsStatus >> 2) & 1, (tsStatus >> 1) & 1, tsStatus & 1);

char sysHex, m1sHex, m2sHex;

snprintf(sysHex, sizeof(sysHex), "%04X", sysStatus);

snprintf(m1sHex, sizeof(m1sHex), "%04X", mag1s);

snprintf(m2sHex, sizeof(m2sHex), "%04X", mag2s);

char line;

snprintf(line, sizeof(line),

"%10.4f,%10.4f,%4d,%s,%s,%s,%10.2f,%10.2f,%10.2f,%5.1f,%8.5f,%8.5f,%8.5f,%5.1f,%8.1f,%8.1f,%8.1f,%5.1f,%s,%s,%s,%s",

mag1, mag2, fiducial, sysHex, m1sHex, m2sHex,

gyroX, gyroY, gyroZ, gyroT,

accelX, accelY, accelZ, accelT,

compassX, compassY, compassZ, compassT,

gpsDate, gpsTime, tsStr, gpsString);

if (sdReady && logFile) {

logFile.println(line);

if (sampleCount % 1000 == 0) {

logFile.flush();

}

if (sampleCount % 500 == 0) {

Serial.println(line);

}

void parsePacket(uint8_t* pkt) {

// Get PPS bits from MFAM system status

uint16_t firstSysStatus = pkt | (pkt << 8);

uint8_t mfamPPSbits = (firstSysStatus >> 12) & 0x0C;

tsStatus = (tsStatus & 0x03) | mfamPPSbits;

for (int i = 0; i < NUM_SAMPLES; i++) {

int offset = HEADER_SIZE + (i * SAMPLE_SIZE);

uint16_t frameID = pkt | (pkt << 8);

uint16_t fiducial = frameID & 0x07FF;

uint16_t sysStatus = pkt | (pkt << 8);

uint32_t mag1raw = pkt | (pkt << 8) |

((uint32_t)pkt << 16) | ((uint32_t)pkt << 24);

double mag1 = mag1raw * 0.05 / 1000.0;

uint16_t mag1status = pkt | (pkt << 8);

uint32_t mag2raw = pkt | (pkt << 8) |

((uint32_t)pkt << 16) | ((uint32_t)pkt << 24);

double mag2 = mag2raw * 0.05 / 1000.0;

uint16_t mag2status = pkt | (pkt << 8);

parseAuxChannels(pkt + offset, frameID);

sampleCount++;

downsampleCounter++;

if (downsampleCounter >= DOWNSAMPLE_FACTOR) {

downsampleCounter = 0;

writeSample(millis(), fiducial, mag1, mag1status, mag2, mag2status, sysStatus);

}

Survey Manager quits when exporting to Montaj/GDB format

Magnetics SW — Wed, 17 Dec 2025 18:26:02 +0000

Survey Manager 3.5.1433 and earlier versions may exit unexpectedly after the user has selected "Export GDB" to export magnetometer survey data to a Montaj-compatible database..

Survey Manager may exit without notice or it may show some information about the failure, including steps to open a service request with Seequent.

On systems with Montaj 2025.1 or earlier, this issue may be fixed by updating Montaj to the most recent version (2025.2 at the time of this post) and verifying that Survey Manager is at its most recent version (3.5.1433 at the time of this post).

RE: MagEditor instructional video is now online

Rui Zhang — Tue, 04 Nov 2025 02:36:49 +0000

@geophysicist_burak Can you please upload some sample csv files to the folder below so that we can look into it:

File Upload

Thanks!

RE: MagEditor CSV Import Problems

Burak Genc — Mon, 03 Nov 2025 22:01:46 +0000

Hello, I wanted to try our MagEditor software, but it didn't accept any of the files I converted to 10 Hz, 20 Hz, 50 Hz, 100 Hz, and 1000 Hz CSV formats from Survey Manager. What's the reason and how can I fix it? My operating system is Windows 11 Home Single, and my computer specifications are:
Processor: Intel(R) Core(TM) i9-14900HX (2.20 GHz)
Installed RAM: 32.0 GB (usable: 31.6 GB)
System type: 64-bit operating system, x64-based processor.

Quickstart Guide Now Available

Gretchen Schmauder — Wed, 29 Oct 2025 16:31:38 +0000

Find the most recent version of the Quickstart Guide on the MagElement product page, or click the link

here