Source Reference Documentation

• Appendix D to RTCA DO-229D
• Appendix B to ICAO Annex 10

Encode

Allows encoding of user-input data into a FAS Data Block. Supports SBAS and GBAS encoding. For valid field types see table below. Access to this page is restricted to registered users.

Notes on decimal formatting:

• Period (.) is used as the decimal separator
• Thousands separator is not supported

Valid Field Types
Field	SBAS/GBAS	Range/Format/Resolution	Note
Block Type	SBAS/GBAS		Toggle of Block Type between SBAS and GBAS
Operation Type	SBAS/GBAS	SBAS {[0]Straight In, [1-15]Reserved}, GBAS {[0]Straight In, [1]Terminal Area Path, [2]Missed Approach, [3-15]Spare}
SBAS Provider	SBAS/GBAS	SBAS {[0]WAAS, [1]EGNOS, [2]MSAS, [3-13]Spare, [14]GBAS Only, [15]Any SBAS Provider}, GBAS {[14]GBAS Only}
Airport Identifier	SBAS/GBAS	[A-Z\\d]{0..4}
Runway	SBAS/GBAS	{[0] None, [1] R, [2] C, [3] L}
Approach Performance Designator	SBAS/GBAS	SBAS {[0]LPV, [1]Category I, [2]Reserved for Category II, [3]Reserved for Category III, [4-7]Spare}, GBAS {[0]GSL A OR GSL B, [1]GSL C, [2]GSL D, [3]GSL E, [4]GSL F, [5-7]Spare}
Route Indicator	SBAS/GBAS	[A-HJ-NP-Z]{0,1}
Reference Path Data Selector	SBAS/GBAS	0 - 48
Reference Path Identifier	SBAS/GBAS	[A-Z\\d]{0,4}
LTP/FTP Latitude	SBAS/GBAS	DDMMSS.ssss[N|S]
LTP/FTP Longitude	SBAS/GBAS	DDDMMSS.ssss[W|E]
LTP/FTP Ellipsoidal Height (metres)	SBAS/GBAS	-512.0 - 6041.5, 0.1	Period used as decimal separator, thousands separator is not supported
FPAP Latitude	SBAS/GBAS	DDMMSS.ssss[N|S]
FPAP Longitude	SBAS/GBAS	DDDMMSS.ssss[W|E]
Threshold Crossing Height	SBAS/GBAS	{[0]ft, [1]m}
Glidepath Angle (degrees)	SBAS/GBAS	0.0 - 90.0, 0.01	Period used for decimal separator
Course Width (metres)	SBAS/GBAS	80 - 143.75, 0.25	Period used for decimal separator
Length Offset (metres)	SBAS/GBAS	0 - 2032, 8	Thousands separator is not supported
HAL	SBAS Only	0.0 - 50.8, 0.2	Period used for decimal separator
VAL	SBAS Only	0.0 - 50.8, 0.2	Period used for decimal separator
CRC Value	SBAS/GBAS	HEX	Hex CRC Value

Decode

Allows decoding of an existing FAS Data Block back into it's component fields. Supports SBAS and GBAS decoding. Access to this page is restricted to registered users.

Decode File

Allows decoding of an existing FAS Data Block, in binary file format, back into it's component fields. Supports SBAS and GBAS decoding. Access to this page is restricted to registered users.

Results

FAS Data Block encoding and decoding results are displayed along with a CRC value check. Supports the editing of component fields and the export to a text report or binary file. For valid field types see table above. Access to this page is restricted to registered users.

Forgotten Password

Allows a registered user to reset their password. The new system-generated password will then be emailed to the user.

Update Password/Email Address

Allows a registered user to update their password or email address.

Further Help

If you would to become a registered user or if you have any queries regarding an existing registration please contact fasdb.helpdesk@ecacnav.com.