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Bad Elf GNSS Surveyor
Bluetooth GNSS Receiver & Datalogger with Barometric Sensor
Perfect for iPad applications that need 1 meter accuracy using U-BLOX SBAS+PPP
Also supports differential GPS (DGPS) using RTCM correction messages

The Bad Elf GNSS Surveyor delivers ~1-meter positioning out of the box to the iPad for use in GIS, mapping, agriculture, and survey activities.  The GNSS Surveyor can also stream raw satellite data to applications, which can then implement their own differential GPS or RTX algorithms to achieve precise positioning on the order of 10-50 cm via post processing.. 

GIS/Mapping Features

  • Stationary high precision GNSS as low as 1m  out of the box with SBAS+PPP
  • 10-50 cm accuracy capable via app  post processing (COMING SOON via  3rd party apps using the Bad Elf SDK)
  • Differential GPS (DGPS) supported  using RTCM correction messages from  local reference stations or aiding network  (COMING SOON via 3rd party apps using the Bad Elf SDK)
  • 56 channel receiver supports GPS (US), GLONASS (Russia), and QZSS (Japan) constellations with SBAS (WAAS/EGNOS/MSAS)
  • Obtain altitude from GPS or from the built-in barometer, which can be calibrated to a known altitude or  pressure
  • No internet connection or monthly subscription required

Bluetooth GPS Features

  • Sample rate configurable to 10Hz
  • View GPS + GLONASS status quickly with the backlit LCD
  • All day battery life allows you to track for up to 35 hours.
  • Log up to 5 hours of raw satellite data directly on your GNSS Surveyor
  • Access data logs directly from any PC or Mac using the included USB cable. GPS appears just like a USB thumb drive
  • USB connectivity to PC or Mac provides streaming data, raw or NMEA
  • Quickly acquires satellite lock without cell tower assistance. Hot start time as quick as 1 second
  • IPX4 splash resistance makes this device ready for outdoors.

GPS Technical Specs:

  • < 1 meter stationary accuracy with SBAS+PPP
  • 2.5 meter accuracy while in motion
  • 60,000ft/18,000m maximum altitude
  • 1000mph/1600kph maximum speed
  • Up to 10Hz position update rate
  • Fast GPS lock times (45 secs or less)
  • 56-channel GPS/GLONASS/QZSS receiver
  • RTCM support (via 3rd party apps and SDK)
  • Barometer for barometric altitude
  • Bright yellow enclosure to find easily outdoors


Bad Elf GPS Pro Screen Bad Elf GPS Pro Screen Bad Elf GPS Pro Screen

App Support. The GNSS Surveyor works out of the box with all location services aware iOS apps, but requires custom integration using the Bad Elf SDK to access the advanced data and features available.  Bad Elf has begun working with several developers to support the GNSS Surveyor directly.  If you have an app and would like to support the GNSS Surveyor, please contact support today. 

Simple to use. Easy to enjoy.  At Bad Elf, we strive to create high quality, dependable products consistent with Apple's philosophy of "It just works!" Just turn on your Bad Elf GNSS Receiver and get to work. No complicated setup. Extra long battery life. No hassles.

Great Products. World-Class Service.  Need assistance? Bad Elf works hard to provide world-class customer service. If you have questions or concerns, please ask.

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User Guide

Bad Elf

Bad elf GNSS survayor

In the Box:
• Bad Elf GNSS Surveyor Device
• 3ft (90cm) miniUSB cable for charging
• 12-24V DC vehicle USB charger

• Detachable neck lanyard

User's manual

Made for iPhone, iPad, iPod


• iPod touch (2nd generation and newer
• iPhone (3G and newer)
iPad (original and newer)
• iPad mini (original and newer)

Compatible Apps:
Find them here

Product Specs:
• MiniUSB port for charging and ElfPort expansion
• 128x96 dot LCD screen with backlight
• 200+ hour datalogger memory
• Upgradable firmware
• Dimensions: 3" x 2.4" x 0.7" (76.5mm x 61.5mm x 17.5mm)
Weight: 3.2 oz (90 grams)

Bad Elf GNSS Surveyor


Bad Elf | GNSS Surveyor | BE-GPS-3300 | iPhone iPad iPod

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