Difference between pages "DFN observatory data folders and files structure" and "Camera Maintenance Toolkit"

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Each DFN observatory has several disks with partitions for data. The operating system and buffer for several nights of data is on a fast and low power SSD drive, typically 500GB size. Most of it's  size is allocated to data0 partition. This one is mounted as /data0 in the embedded PC OS filesystem. Last up to two nights of raw data plus all history of log files are typically stored in /data0.
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== DFNext Maintenance Toolkit ==
  
On top of that, to be able to hold moths or years of data, there are removable drives. The number of drives depends on the observatory type. DFNITs have just one drive, DFNSMALLs two drives and DFNEXTs three drives. These are mounted as /data1, /data2 and /data3. Every day in late morning the SW in the observatory moves all the data except last night from the /data0 buffer to the removable (archive) drives. They fill up from #1 to #3.
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=== Basic Toolkit ===
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7mm spanner
  
''Note: When they get completely full, the SW starts compressing the old data - converting rwa (.NEF) images to .jpg, but only those images, where event detection was successfully executed and did not detect any likely fireball event. This compression functionality extends the time before the disk need to be replaced or data remotely deleted.''
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7mm socket for installing lens (you can do it with the spanner, but it's a pain)
  
The data structure in /dataX folders is following:
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8mm spanner
/data1
 
├── DFNEXT022
 
│   ├── 2018
 
│   │   ├── 01
 
│   │   │   ├── 2018-01-04_DFNEXT022_1515114584
 
│   │   │   ├── 2018-01-05_DFNEXT022_1515112201
 
                      ...
 
│   │   │   ├── 2018-01-30_DFNEXT022_1517353916
 
│   │   │   └── 2018-01-31_DFNEXT022_1517440320
 
│   │   ├── 02
 
│   │   │   ├── 2018-02-01_DFNEXT022_1517526718
 
│   │   │   ├── 2018-02-02_DFNEXT022_1517613118
 
│   │   │   ├── 2018-02-03_DFNEXT022_1517699520
 
  
Under normal conditions there is one folder with images per night - unless there is for example power cut or some other interruption during the night. We call these chunks of data "camera sessions".
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13mm spanner
  
As you can see, the data storage is organised by time and the folders have the date included in the name.
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Adjustable spanner
  
2018-01-30_DFNEXT022_1517353916 ... YYYY-MM-DD _ observatory name _ UNIX epoch time at the time when folder was created
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<nowiki>#</nowiki>1 Phillips driver
  
Each of these folders contains up to over 1000 captured still images and a few other files like text logs. (The number of images depends of the duration of night and cloudiness.)
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<nowiki>#</nowiki>2 Phillips driver
The files (still images) have time-based file names as well, see the example
 
 
022_2018-01-31_143200_E_DSC_1644.NEF  ... NNN_YYYY-MM-DD_HHMMSS_T_DSC_XXXX.NEF
 
  
where
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1.4-2.4mm flat head screw driver for PC power terminals
  
'''NNN1''' is observatory serial number
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Molex pin removal tool
'''YYYY-MM-DD_HHMMSS''' is UTC time of the beginning of the exposure
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'''T''' is the camera type (missing or S: DFNSMALL, E: DFNEXT, K: DFNKIT)
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Camera Key
'''DSC_XXXX.NEF''' is the original file name from the Nikon DSLR
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=== Additional Tools that may be useful ===
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<nowiki>#</nowiki>0 Phillips if you need to replace or install modem
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13mm socket with extension for removing base plate if required
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=== Installation Toolkit ===
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Long nosed pliers
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Side cutters
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UV resistant cable ties
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UV resistant silicone to glue the outer blower ducting
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=== Power Cable Assembly Toolkit ===
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Soldering iron
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Wire strippers
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Sharp utility knife with extendable blade (snap-off type recommended)

Revision as of 16:52, 6 September 2019

DFNext Maintenance Toolkit

Basic Toolkit

7mm spanner

7mm socket for installing lens (you can do it with the spanner, but it's a pain)

8mm spanner

13mm spanner

Adjustable spanner

#1 Phillips driver

#2 Phillips driver

1.4-2.4mm flat head screw driver for PC power terminals

Molex pin removal tool

Camera Key

Additional Tools that may be useful

#0 Phillips if you need to replace or install modem

13mm socket with extension for removing base plate if required

Installation Toolkit

Long nosed pliers

Side cutters

UV resistant cable ties

UV resistant silicone to glue the outer blower ducting

Power Cable Assembly Toolkit

Soldering iron

Wire strippers

Sharp utility knife with extendable blade (snap-off type recommended)