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TRANSLAND (SATLOC) BINARY AIR LOG FILE FORMATS

Version: 3.76 • Document title in PDF: AIRSTAR DATABASE DESIGN Author: Gary J. Bivin Pages: 29 Date: March 15, 2023

Proprietary Notice — The original PDF marks the content as Company Proprietary and not to be shared outside Transland without permission. This Markdown is a faithful conversion meant for internal/reference use.

Company Address: 1206 Hatton Rd Suite A, Wichita Falls, TX. 76302

Revision History

Version	Date	Comments
3.34	4 Apr 2001	Added Packet Type 2 (Position Compressed) – OUTBACK applications
3.35	4 May 2001	Added Marker Type table, new type for RETURN mark.
3.40	1 Apr 2004	Added Total Boundary Area record.
3.41	17 May 2004	Added Flow Rates record (#32).
3.42	7 June 2004	Added Prescription Map Name record (#141).
3.43	24 Aug 2004	Expansion of time stamp format (extended year field); Changes to System Calibration record (#102).
3.44	21 Jan 2005	Added Spray Edges record (#35).
3.45	18 Mar 2005	Added Job Info record (#151); Changes to System Calibration record (#102).
3.46	19 Nov 2007	Pivot structure 80, marker fixed at 17 bytes for Field Notes applications.
3.47	11 Dec 2007	Editable mark, packet 60, marker 31.
3.48	5 Mar 2008	131, 132 mark type in record 60; Start/End Mark; Change of RHS to Outback; Change of SATLOC to Hemisphere GPS.
3.49	14 Sept 2008	Added Job Notes Extended; Added Record 61: Marker Unicode Extension; Added Records 206–207: Job Info Unicode Extensions.
3.50	29 Aug 2010	Merge Air + Ground AG forks; update revision number; rearranged record definitions; add GPS Status (extended); clarify Timestamp and Spray Edges.
3.51	28 Sept 2010	Add Job Spatial Extent record (#208).
3.52	6 Oct 2010	Rename Spatial Extent → Job Filter (#208).
3.53	19 Oct 2010	Define Section Geometry record (#36); define Target & Actual Application rates (#34, #38).
3.54	27 Jan 2011	Fix GPS Status Extended (#11).
3.55	18 Mar 2011	Add Section Bitmask record.
3.56	18 May 2011	Revise Section Geometry (#38).
3.57	22 Aug 2011	Added Record #43: (Air) AgDisp drift modeling status.
3.58	28 Jan 2013	Added Record #45: (Air) TACH data.
3.60	11 June 2013	New simplified document for Air; Added Long 01 Record.
3.61	01 Aug 2014	Reduced doc referring to Record #43.
3.62	25 Nov 2015	New simplified document; Added: IF2 DRY Recorded #38; SBC CPU Temp #56.
3.64	21 Jun 2017	Updated “Swathing Setup“ record #120 (Pattern index).
3.65	05 Nov 2018	Added IF2 Liquid BOOM Pressures Pri/Dual (#47).
3.66	07 Mar 2019	Added Micronair RPM project (#52 Micro‑RPM).
3.67	26 Jul 2019	Added 1‑byte bit fields at end Enhanced 01 POS record (pump, polygon, constant/VR, auto boom).
3.68	21 Feb 2020; mod 19 Jun 2020	New LOG Record 57 Meterate; later changed Tach RPM per E‑Speed to uint16_t.
3.69	03 May 2020	New LOG Record 142 BOOM sections selected in meters; MAN/AUTO, 1–5 sections.
3.70	21 May 2020	Added 3 BYTES to end of record 10 (GPS Status) for AIMMS IMU data.
3.71	20 Oct 2020	Added 2 bytes to end of Enhanced 01 POS for turbine STDev (Primary/Dual).
3.72	05 Mar 2021	Added 3 floats (fVNorth, fVEast, fVUp) to Enhanced 01 POS.
3.73	26 Apr 2022	Modified record 142 BOOM Sections for new controller.
3.74	14 Oct 2022	Modified record 1 Position Enhanced Record.
3.75	18 Oct 2022	Modified record 46 Controller TYPE by Name.
3.76	15 Mar 2023	Added TLEG record 39.

1. Overall Log File Format

A log file begins with the ASCII characters "AS", followed by the ASCII IntelliTrac (IT) Version Number, terminated by a zero (0) byte. The binary data records then follow.

Position records are logged periodically, as specified by Logging Interval and Log Minimum Speed in IntelliTrac setup.
The System Setup record(s) are written at the beginning of the log file; thereafter only when changed.
Other log records are written out only when the information they contain is first known, or has been changed.

1.1 Replay Procedures

The file is scanned for the next Record Start Flag; the record is validated with the Checksum and correspondence between record type and length.

For reverse compatibility, unrecognized records should be skipped with no further action.

2. General Record Format

Field Type	Bytes	Format	Units
Record Start Flag	1	uint8_t	0xA5
Record Length	1	uint8_t	# of bytes
Record Type	1	uint8_t
Record Checksum	1	uint8_t
Data	variable

The Record Checksum is the XOR of all bytes from the Record Start Flag to the end of the data inclusive.

Total length of a record is the length of the data + 4 bytes, as shown above. Note that the maximum length of a record, including the 4 header bytes, is 255.

Data is logged in metric units whenever applicable.

2.1 Time Stamp

A Time Stamp field consists of 5 bytes:

Component	Bits	Byte Position	Description
Second	6	0 (bits 0-5)	Seconds (0-59)
Minute	6	0-1 (bits 6-11)	Minutes (0-59)
Hour	5	1 (bits 12-16)	Hours (0-23)
Day	5	2 (bits 17-21)	Day of month (1-31)
Month	4	2-3 (bits 22-25)	Month (1-12)
Year	7	3 (bits 26-32)	Years since 2000

Note: Time is logged in local time (not UTC). Consequently, if UTC or similar timestamps are required, then such conversions are left to the application

3. Record Types

3.1 Position Short Record

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	`43` (0x2B)
Record Type	1	`uint8_t`	`1`
Record Checksum	1	`uint8_t`	—
Time of Position	5	Time Stamp	—
Latitude	8	`double`	degrees
Longitude	8	`double`	degrees
Altitude	4	`float`	meters
Speed	4	`float`	m/sec
Track	4	`float`	degrees
X‑Track Deviation	4	`float`	meters
Differential Age	1	`uint8_t`	seconds
Flags (numeric)	1	`uint8_t`	see Flags below

Total Length: 43

Flags (final byte, by numeric value)

Value	Meaning
0	Spray OFF (boom pressure sensor OPEN)
1	Not used
2	Spray ON (interpolated position)

3.2 Position Enhanced Record (Position/Flow Rate/Boom/Valve Position)

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	Current `78` (0x4E); earlier `66` (0x42)
Record Type	1	`uint8_t`	`1`
Record Checksum	1	`uint8_t`	—
Time of Position	5	Time Stamp	—
Latitude	8	`double`	degrees
Longitude	8	`double`	degrees
Altitude	4	`float`	meters
Speed	4	`float`	m/sec
Track	4	`float`	degrees
X‑Track Deviation	4	`float`	meters
Differential Age	1	`uint8_t`	seconds
Flags (numeric)	1	`uint8_t`	see record‑specific flags
Record Type (numeric)	1	`uint8_t`	`1` = Enhanced; `2` = Enhanced/LPC boom on
Boom Control Status	1	`uint8_t`	bit0 = boom On/Off
Target Flow Rate	4	`float`	L/ha
Target Flow Rate	4	`float`	L/min
Flow Rate	4	`float`	L/ha
Flow Rate	4	`float`	L/min
Valve Position	2	`int`	Shaft Position
Status bit fields	1	`uint8_t`	Byte 64; see table below
Primary Flow Turbine STDev	1	`uint8_t`	0–255%
Dual Flow Turbine STDev	1	`uint8_t`	0–255%
Raw GPS velocity fVNorth	4	`float`	Raw GPS fVNorth
Raw GPS velocity fVEast	4	`float`	Raw GPS fVEast
Raw GPS velocity fVUp	4	`float`	Raw GPS fVUp

Total Length: 78

Byte 64 — Status Bit Fields

Bits	Flags
Byte 64	0: Aircraft pump free to run (aircraft is applying product)
Byte 64	1: Inside a JOB or PMap polygon
Byte 64	2: Constant Rate Poly or VR Rate set
Byte 64	3: AUTO‑BOOM set to ON

Notes

To identify Short vs Enhanced Position record, read byte Record Type.
When Position Enhanced is logged, the following will not be logged: Flow Target Rate (Type 32) and Flow Rate (Type 30).

3.3 GPS

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`10`
Record Checksum	1	`uint8_t`	—
GDOP	4	`float`	—
Satellites	1	`uint8_t`	`# tracked << 4` + `# used`
Received DGPS Stn ID	2	`int`	—
AIMMS NAV Source	1	`uint8_t`	`0 = IMU`, `1 = GPS`
AIMMS SV in GPS Solution	1	`uint8_t`	—
AIMMS GPS POS‑Type	1	`uint8_t`	`16 = SPS`, `18 = WAAS`, `19 = Extrapolated`, `0 = None`

Total Length: 14

3.4 GPS Status Extended

Not used at this time (May/2020).

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`11`
Record Checksum	1	`uint8_t`	—
BIN1 NavMode	2	`uint16_t`	—
Age Of Differential	2	`uint16_t`	—
Reserved	4	`uint32_t`	—
Reserved	4	`uint32_t`	—
GDOP	4	`float`	—
HDOP	4	`float`	—
Satellites	1	`uint8_t`	`# tracked << 4` + `# used`
Received DGPS Stn ID	2	`uint16_t`	—

Total Length: 27

3.5 Swath Number

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`20`
Record Checksum	1	`uint8_t`	—
Swath Number	2	`int`	—

Total Length: 6

Note: A‑B swath number = 1; swaths are 2,3,4… right; −2,−3,−4… left.

3.6 Flow Monitor/Control

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`30`
Record Checksum	1	`uint8_t`	—
Flow Rate	4	`float`	liters/minute
Valve Position	2	`int`	Position

Total Length: 10

Output conditions: only if flow monitoring is active, and only on change.
Compatibility: Valve Position may be absent in legacy logs — support both 8‑byte and 10‑byte variants (default to zero if missing).

3.7 Dual Flow Monitor/Control

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`31`
Record Checksum	1	`uint8_t`	—
Primary Flow Rate	4	`float`	liters/minute
Secondary Flow Rate	4	`float`	liters/minute
Primary Valve Position	2	`int`	Position
Secondary Valve Position	2	`int`	Position

Total Length: 16
Note: Deprecated — do not use in new software.

3.8 Target Application Rates

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`32` (0x20)
Record Checksum	1	`uint8_t`	—
Target Application Rate	4	`float`	Target Rate LPM
Flags	1	`uint8_t`	BOOM `0=Off, 1=On (Flow)`

Total Length: 9

3.9 Dual Flow Target Rates (Version 3.46)

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`33`
Record Checksum	1	`uint8_t`	—
Chan 1: Primary Target Flow Rate	4	`float`	Primary liters/minute
Chan 1: Primary Control Status	1	`uint8_t`	bit0 = Primary boom on/off
Chan 1: Secondary Target Flow Rate	4	`float`	Secondary liters/minute
Chan 1: Secondary Control Status	1	`uint8_t`	bit0 = Secondary boom on/off
…repeat for each configured channel…	—	—	—

Total Length: 4 + 10 × number_of_channels

3.10 Applied Rates

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`36`
Record Checksum	1	`uint8_t`	—
Number of channels	1	`uint16_t`	`0..41`
Channel 1: Actual Application Units	1	`uint16_t`	see table (units id)
Channel 1: Actual Application Rate	4	`float`	—
…repeat per channel…	—	—	—

Total Length: 6 + 6 × number_of_channels

3.11 Fire/Dry Gate Status (Version 3.47)

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`37`
Record Checksum	1	`uint8_t`	—
Application MODE	1	`uint8_t`	Mode 1–7
Units	1	`char`	`E` (English) \
Applied Resolution	1	`uint8_t`	0 = 1/16”, 1 = 1 mm, 2 = 1/32”
Active Levels	1	`uint8_t`	1–7 levels
Logged Target Spread	4	`float`	(Not used) Kg/min
Applied Spread Rate	4	`float`	Kg/Ha
Applied Spread per min	4	`float`	Kg/min (Not used)
Applied Gate Level*	2	`int`	resolution units
Encoder Position	2	`int`	1–2048
Target Encoder Position	2	`int`	1–2048
GPS Trim	2	`int`	steps ± 1 to n
Manual Trim	2	`int`	steps ± 1 to n

Total Length: 30

* Gate Level = numeric level × Applied Resolution (read resolution first). Example: resolution 1/16", value 12 → 12/16" = ¾".

3.12 IF2 Dry Gate (Version 3.63)

Part A

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`38` (0x26) `"LOGID_IF2DRY"`
Record Checksum	1	`uint8_t`	—
Application MODE	1	`uint8_t`	Mode 2
TASK Mode	1	`uint8_t`	`0..3` (Local FDG/No PMap = 3)
Applied Resolution	1	`uint8_t`	`0=1/32"`, `1=1/16"`
Machine State	1	`uint8_t`	`0..14`
Switch State	1	`uint8_t`	bit field: bit 0 = ARM On/Off, bit 1 = FUSALAGE On/Off, bit 2 = TRIGGER On/Off, bit 3 = TRIM On/Off
Gate Status	1	`uint8_t`	bit field: bit 0: 0 = Gate Closed, 1 = Gate Open. Gate at index 0 level or beyond; bits 1 and 2: 0 = Dry Gate Fully Closed, completely latched, 1 = Dry Gate Open (This is from Soft Position and beyond), 2 = Dry Gate at Soft Level (Soft closed position (Level) means Gate is 1/16 OPEN or at selected user level)
Gate SOFT State	1	`uint8_t`	`0=Go index 0`, `1=User encoder pos`
Target Spread Rate	4	`float`	Kg/Ha
Target Spread per min	4	`float`	(Not used) Kg/min
Applied Spread Rate	4	`float`	Kg/Ha
Applied Spread per min	4	`float`	(Not used) Kg/min
GPS TRIM	2	`int`	± GPS Trimmed Speed Up/Down
Manual TRIM	2	`int`	± Manually Trimmed Up/Down

Part B

Field Type	Bytes	Format	Units
Misc States	2	`uint16_t`	bit field: bit 0: 0 = "Encoder Stationary", 1 = "Encoder Moved"; bit 1: 0 = "Encoder Error", 1 = "Encoder OK"; bit 2: 0 = Hydro Pump State OFF, 1 = Hydro Pump State ON; bit 3: 0 = Hydro OPEN Solenoid OFF, 1 = Hydro OPEN Solenoid ON; bit 4: 0 = Hydro CLOSE Solenoid OFF, 1 = Hydro CLOSE Solenoid ON
Gate Level Steps	2	`uint16_t`	`0..272` in 1/32"
Encoder Position	2	`uint16_t`	absolute `0..10,000`
Cumulative Uptime CPU	2	`uint16_t`	hours
SOFT Level Target	2	`uint16_t`	`12..2000`
PGT P Gain	2	`uint16_t`	`0..65535`
PGT G Gain	2	`uint16_t`	`0..8000`
PGT Tolerance	2	`uint16_t`	`0..65535`

Total Length: 47

3.13 TLEG Dry Gate (Version 3.76)

Part A

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`39` (0x27) `"LOGID_TLEGDRY"`
Record Checksum	1	`uint8_t`	—
Application OP Mode	1	`uint8_t`	OFF = 0x00, Open GATE = 0x01, Close GATE = 0x02, Open GATE With Torque Override = 0x03, Close GATE With Torque Override = 0x04, Manual Assist Mode = 0x05, Hold Position = 0x06, Calibrations = 0x07, Override Recovery = 0x08
TASK Mode	1	`uint8_t`	`0`=Single/Profiles, `1`=Levels/FDG
Applied Resolution	1	`uint8_t`	`0=1/32"`, `1=1/16"`
Machine State	1	`uint8_t`	0 to 15 enumerated: TLEG_STATE_INIT "INIT", TLEG_STATE_MESSAGE_WAITING "MESSAGE_WAIT", TLEG_STATE_READY "READY", TLEG_FREE_MOVEMENT "FREE", TLEG_ACTIVE_MOVEMENT "ACTIVE", TLEG_DUMMY_1 "Dummy_1", TLEG_DUMMY_2 "Dummy_2", TLEG_DUMMY_3 "Dummy_3", TLEG_DUMMY_4 "Dummy_4", TLEG_DUMMY_5 "Dummy_5", TLEG_STATE_NOT_ARMED "NOT ARMED", TLEG_STATE_SECURITY_OVERRIDE "NOW FREE", TLEG_STATE_BAD_CAL "BAD CAL", TLEG_STATE_JAM_DETECTED "JAM_DETECTED", TLEG_STATE_UNKNOWN "STATE UNKNOWN"
Switch State	1	`uint8_t`	bit field: bit 0 = ARM On/Off, bit 1 = TRIGGER On/Off, bit 2 = FUSELAGE On/Off, bit 3 = MOTOR On/Off, bit 4 = Spray ON On/Off, bit 5 = GATE Moving Yes/No, bit 6 = Encoder Status OK/Error

Part B

Field Type	Bytes	Format	Units
Gate State	1	`uint8_t`	bit field: bit 0 Gate Closed State: 0 = Latched, 1 = Soft; bit 1 Gate Open: 0 = Closed, 1 = Gate at 1/16" (Soft) or beyond; bit 2 Not used; bit 3 Not used; bit 4 GATE JAM: 0 = No JAM, 1 = JAMMED
USER SELECTED Gate Closed State	1	`uint8_t`	`0=Latched`, `1=User SOFT`
TLEG Internal Temperature	1	`uint8_t`	°C (system closes at ~105 °C)
Target Spread Rate	4	`float`	Kg/Ha
Target Spread per min	4	`float`	(Not used) Kg/min
Applied Spread Rate	4	`float`	Kg/Ha
Applied Spread per min	4	`float`	(Not used) Kg/min
GPS TRIM	2	`short int`	± GPS Trimmed Speed Up/Down
Manual TRIM	2	`short int`	± Manually Trimmed Up/Down
PRE Gate Level Steps	2	`uint16_t`	`0..158` in 1/32" (max 4" 15/16")
Gate Level Steps	2	`uint16_t`	`0..158` in 1/32" (max 4" 15/16")
Encoder Position	2	`uint16_t`	Internal TLEG Encoder position 0 to 360 deg×10 (`0.0°..360.0°*10`)
Cumulative Uptime CPU	2	`uint16_t`	Total hours uptime
LATCHED Target Degrees	2	`uint16_t`	0 to 360 deg×10
SOFT Target Degrees	2	`uint16_t`	0 to 360 deg×10

Total Length: 44

3.14 Laser Altimeter

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`42`
Record Checksum	1	`uint8_t`	—
Height AGL	4	`float`	Meters

Total Length: 8
Output condition: only if configured, and only when Δheight > 0.5 m.

3.15 AgDisp Data (AGD)

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`43` (0x2B)
Record Checksum	1	`uint8_t`	—
Wind Offset Direction	4	`float`	degrees
Applied OFFSET	4	`float`	Meters

Total Length: 12

3.16 TACH Times

Field Type	Bytes	Format	Units
Record Start Flag	1	`byte`	`0xA5`
Record Length	1	`byte`	# of bytes
Record Type	1	`byte`	`45` (0x2D)
Record Checksum	1	`byte`	—
Total TACH Current Time	4	`uint32_t`	Seconds
Total TACH Total Time	4	`uint32_t`	Seconds

Total Length: 12 (0x0C)

3.17 Controller TYPE by Name

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`46` (0x2E)
Record Checksum	1	`uint8_t`	—
Controller TYPE	21	`ASCIIZ`	Controller NAME

Total Length: 25

3.18 IF2 Liquid BOOM Pressure

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`47` (0x2F)
Record Checksum	1	`uint8_t`	—
IF2 Liq/Pri Boom Pressure	4	`float`	Lbs Pressure
IF2 Liq/Dual Boom Pressure	4	`float`	Lbs Pressure

Total Length: 12

3.19 Wind

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`50`
Record Checksum	1	`uint8_t`	—
Wind Direction	2	`int`	degrees
Wind Velocity	4	`float`	m/s

Total Length: 10
Output condition: only if/when wind is calculated.

3.20 Micro‑RPM (Version 3.66)

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	25 (0x19)
Record Type	1	`uint8_t`	`52` (0x34)
Record Checksum	1	`uint8_t`	—
OP Mode	1	`uint8_t`	0 or 1 (On/Off)
Micro‑Atomiser Left 1..5	2×5	`int`	RPM
Micro‑Atomiser Right 1..5	2×5	`int`	RPM

Total Length: 25

3.21 SBC (CPU Temps) (Version 3.63)

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`56` (0x38)
Record Checksum	1	`uint8_t`	—
CPU Temperature sensor 1	4	`float`	degrees
CPU Temperature sensor 2	4	`float`	degrees
CPU Temperature sensor 3	4	`float`	degrees
CPU Temperature sensor 4	4	`float`	degrees

Total Length: 20

3.22 Meterate (Version 3.68)

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`57` (0x39)
Record Checksum	1	`uint8_t`	—
Auto/Manual	1	`uint8_t`	Auto or Manual state
Base Speed	1	`uint8_t`	MPH
Every Speed	2	`uint16_t`	MPH ×100
Control Voltage	2	`uint16_t`	Vdc ×100
Tach RPM	2	`uint16_t`	RPM
Steps E‑Speed	1	`uint8_t`	RPM steps per E‑Speed
Target Spread Rate	2	`uint16_t`	Kg/Ha ×100
Target Spread Per Min	4	`uint32_t`	Kg/min ×1000
Applied Spread Rate	2	`uint16_t`	Kg/Ha ×100
Applied Spread Per Min	4	`uint32_t`	Kg/min ×1000

Total Length: 25

3.23 Marker

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`60`
Record Checksum	1	`uint8_t`	—
Marker Type	1	`uint8_t`	—
Latitude	8	`double`	degrees
Longitude	8	`double`	degrees
Altitude	4	`float`	meters
Label Length	1	`uint8_t`	# of bytes
Label String		`ASCIIZ` bytes

Total Length: 26 + label
A Label Length of 0 is valid (no label text).

3.24 Marker — Unicode

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`61`
Record Checksum	1	`uint8_t`	—
Marker Type	1	`uint8_t`	—
Latitude	8	`double`	degrees
Longitude	8	`double`	degrees
Altitude	4	`float`	meters
Label Length	1	`uint8_t`	# of bytes
Label String		`Unicode` string with zero word termination

Total Length: 26 + label

3.25 System Setup

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`100` (0x64)
Record Checksum	1	`uint8_t`	—
Time	5	Time Stamp	—
Pilot Name	11	`ASCIIZ`	—
Aircraft ID	11	`ASCIIZ`	—
Logging Interval	1	`uint8_t`	seconds ×10
Logging Min Speed	4	`float`	m/s
GPS Mask Angle	1	`uint8_t`	degrees
GMT Offset	2	`int`	minutes
Compass Variation	4	`float`	degrees

Total Length: 43

3.26 Environmental

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`110`
Record Checksum	1	`uint8_t`	—
Temperature	4	`float`	degrees
Relative Humidity	1	`uint8_t`	% humidity
Barometric Pressure	4	`float`	kPsc

Total Length: 13

3.27 Swathing Setup

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`120`
Record Checksum	1	`uint8_t`	—
Job ID	11	`ASCIIZ`	10 + NULL
Pattern Type	1	`uint8_t`	see Pattern Types
Pattern L/R	1	`char`	`'L'` or `'R'`
Swath Width	4	`float`	meters
Job Long Label Name	31	`ASCIIZ`	30 + NULL

Total Length: 21 or 52

Pattern Types

ID	Name
0	Back_To_Back
1	Racetrack
2	Squeeze
3	Quick_Racetrack
4	Reverse_Racetrack
5	Expand
6	Auto_Lock
7	Back_To_Back_Half_Boom
8	Contour
9	Contour/Headland
10	Area_Measurement
11	Multi_Back_To_Back
12	Back_To_Back_Skip
20	QuickTrac_X
21	Nearest_Swath

3.28 Flow Setup

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`140`
Record Checksum	1	`uint8_t`	—
Flow Control Status	1	`uint8_t`	`0=OFF; 1=Control ON; 2=Monitor Only; +0x40 Variable else Constant; +0x80 DRY else WET`
Total Spray Liters	4	`float`	Liters
Valve Calibration	2	`int`	—
Meter Calibration	4	`float`	counts/liter
Application Per Area	4	`float`	L/hectare
Application Rate	4	`float`	L/min

Total Length: 23
Output: when System Options written and on change.

3.29 Boom Sections

(Not fully tested, 15 Mar 2023)

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`142` (0xE8)
Record Checksum	1	`uint8_t`	—
Boom State	1	`uint8_t`	`0=Manual, 1=Automatic`
Boom Sections	1	`uint8_t`	`1, 3, 4, or 5`
Boom Valve States	1	`uint8_t`	bit field: 2 or 3 valve states O/C
Far LEFT Section	4	`uint32_t`	meters ×1000 m
LEFT/CENTER Section	4	`uint32_t`	meters ×1000 m
LEFT Section	4	`uint32_t`	meters ×1000 m
CENTER Section	4	`uint32_t`	meters ×1000 m
RIGHT Section	4	`uint32_t`	meters ×1000 m
Far RIGHT Section	4	`uint32_t`	meters ×1000 m

Total Length: 31
Notes

If Boom Sections = 3 (legacy L/C/R): use LEFT, CENTER (may be 0 m), RIGHT.
Bit fields:
- Boom Valve States bits 0..4 map to Far Left, Left, Center, Right, Far Right valves.
- Boom Section States bits 0..5 map to Far Left, Left, Left/Center, Center, Right, Far Right sections.
  The PDF includes diagrams showing valve/section layouts.

3.30 Job Info String

(Note: Used ONLY with Bantam and Bantam2 logs)

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`151`
Record Checksum	1	`uint8_t`	—
Job ID	4	`long`	—
Job Title	30	`ASCIIZ` bytes
Number of Polygons	2	`int`	—
Number of Patterns	2	`int`	—

Total Length: 5 + message
Logged: when a job is opened, or at log start if a job is already open.

3.31 Job Info NAME String

(Note: Used ONLY with Falcon and G4 logs)

Field Type	Bytes	Format	Units
Record Start Flag	1	`uint8_t`	`0xA5`
Record Length	1	`uint8_t`	# of bytes
Record Type	1	`uint8_t`	`152`
Record Checksum	1	`uint8_t`	—
Job Version ID	2	`int`	—
Job File Long Name	32	`ASCIIZ`	(31 + NULL)
Number of Polygons	2	`int`	—
Number of Patterns	2	`int`	—

Total Length: 42
Logged: when a job is opened, or at log start if a job is already open.

Appendix — Checksum

Record checksum is the XOR of all bytes from Record Start Flag through the end of the data (inclusive).

Appendices

Appendix A: Data Types

Type	Size (bytes)	Description
uint8_t	1	Unsigned 8-bit integer
uint16_t	2	Unsigned 16-bit integer
uint32_t	4	Unsigned 32-bit integer
int8_t	1	Signed 8-bit integer
int16_t	2	Signed 16-bit integer
int32_t	4	Signed 32-bit integer
float	4	32-bit floating point
double	8	64-bit floating point

Appendix B: Checksum Calculation

The checksum is calculated as the XOR of all bytes in the record, from the Record Start Flag through the end of the data.

uint8_t calculate_checksum(uint8_t* record, uint8_t length) {
    uint8_t checksum = 0;
    for (int i = 0; i < length; i++) {
        checksum ^= record[i];
    }
    return checksum;
}

Appendix C: Byte Order

All multi-byte numeric values are stored in little-endian format (least significant byte first).

Appendix D: File Extensions

SATLOC log files typically use the following extensions:

.log - Standard log files
.air - Air application specific logs
.sat - SATLOC format logs

Document Generation Information:

Generated from: LOGFileFormat_Air_3_76_converted.md (PDF conversion)
Enhanced with: Transland_SATLOC_Log_File_Formats_v3_76.md (ChatGPT formatting)
Cross-referenced: LOGFileFormat_Air_3_76.md (manual cleanup)
Final validation: 2025-09-05 16:57:22 UTC

End of Document

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TRANSLAND (SATLOC) BINARY AIR LOG FILE FORMATS

Revision History

1. Overall Log File Format

1.1 Replay Procedures

2. General Record Format

2.1 Time Stamp

3. Record Types

3.1 Position Short Record

3.2 Position Enhanced Record (Position/Flow Rate/Boom/Valve Position)

3.3 GPS

3.4 GPS Status Extended

3.5 Swath Number

3.6 Flow Monitor/Control

3.7 Dual Flow Monitor/Control

3.8 Target Application Rates

3.9 Dual Flow Target Rates (Version 3.46)

3.10 Applied Rates

3.11 Fire/Dry Gate Status (Version 3.47)

3.12 IF2 Dry Gate (Version 3.63)

Part A

Part B

3.13 TLEG Dry Gate (Version 3.76)

Part A

Part B

3.14 Laser Altimeter

3.15 AgDisp Data (AGD)

3.16 TACH Times

3.17 Controller TYPE by Name

3.18 IF2 Liquid BOOM Pressure

3.19 Wind

3.20 Micro‑RPM (Version 3.66)

3.21 SBC (CPU Temps) (Version 3.63)

3.22 Meterate (Version 3.68)

3.23 Marker

3.24 Marker — Unicode

3.25 System Setup

3.26 Environmental

3.27 Swathing Setup

3.28 Flow Setup

3.29 Boom Sections

3.30 Job Info String

3.31 Job Info NAME String

Appendix — Checksum

Appendices

Appendix A: Data Types

Appendix B: Checksum Calculation

Appendix C: Byte Order

Appendix D: File Extensions

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