Data Management

When GOBI is powered indoors, GRYFN recommends pointing a small fan at the main exhaust vents to help keep thermals in check. GOBI maintains good temperatures in flight with sufficient airflow across the chassis, but can become quite hot when sitting powered in stagnant air for extended periods of time.

Data Storage

A 500GB internal mSata Solid State Drive (SSD) is installed in the chassis. This internal device collects and stores VNIR Hyperspectral, LiDAR, and GNSS data. A 256GB SD Card is installed in the optional RGB frame camera for storing RGB images.

Offloading Data

Via GRYFN Processing Tool

STEP	ACTION
1	Connect to chassis via Ethernet or WiFi
2	Open GRYFN Processing Tool
3	Open the Bundle Data tab
4	Under Download from Sensor click Query Sensor
5	After a few seconds your GOBI chassis will appear, click on it
6	Click Create GRAW
7	All available missions will appear
8	Select the mission you wish to download
9	Choose a save path

Via FTP Service

First, connect to the GRYFN GOBI chassis via Ethernet. Then, in your FTP application of choice (WinSCP, Filezilla, etc.), to access LiDAR data, VNIR Hyperspectral data, and system logs, use the following session settings:

PARAMETER	VALUE
File Protocol	FTP
Host Name	10.0.65.50
Port Number	21
User Name	gryfn
Password	gryfn

Files can be found in the following directories:

DATA TYPE	DIRECTORY	FILE TYPES
GNSS	/data/{mission_name}/gnss	.00# • Raw data file (where # is the session file, new session is made per UTC hour) .json • System configuration file
LiDAR	/data/{mission_name}	.pcap • Raw LiDAR data packets .json • System configuration fiel
VNIR	/data/capturedData/captured/{dateTime}	.hdr • Hyperspectral data header file .bin • Hyperspectral raw data file .txt • Various frameIndex, settings, and other data files
System Log	/data/gryfn.log.{date}	.log
Frame Camera	Images are stored to the camera's SD Card	.jpg • Image files

Data Confirmation

After the flight, or after data has been downloaded to your local device, check file counts and sizes against the nominal collection rates in the table below to ensure data has been captured properly.

SENSOR TYPE	FILE COUNT	FILE SIZE	NOTES
GNSS-INS	1 file	~1.5MB per minute	A new file will be created if time rolls over the hour (clock time, not capture time).
LiDAR	1 per minute	~175MB per file	First & last file may be smaller May be smaller if over low reflection object.
VNIR	Mission time (s) ÷ Frame Period value ≈ number of data cubes	VNIR data should capture several GB of data for even short flights	Check that frameindex, imu_gps, settings files all exist.
RGB	Image every 2s	~30 - 70MB per image	Check event log vs number of images

Clearing Storage

GNSS-INS, LiDAR, and VNIR

STEP	ACTION
1	Connect to chassis via Ethernet or WiFi
2	Navigate to GOBI WebUI
3	Clear Mission
4	Alternatively, delete missions/files individually via FTP software

Clear Mission button will delete GNSS data, LiDAR data, and VNIR data. RGB data must be deleted from the SD card separately. Only remove data inside the DCIM folder.