Almanac

Current almanac

The latest almanac can be downloaded from the following table.

Almanac file XML Date
2019-11-15 2019-11-15 09:40

Historical Records of almanacs

The most recent almanacs can be downloaded from the following table. Should you need an older almanac, please raise a request through the GSC helpdesk (option: Request on demand products).

Almanac file XML Date
2019-11-12 2019-11-12 09:40
2019-11-05 2019-11-05 09:40
2019-11-01 2019-11-01 09:40
2019-10-29 2019-10-29 09:40
2019-10-25 2019-10-25 09:40
2019-10-22 2019-10-22 09:40
2019-10-18 2019-10-18 09:40
2019-10-15 2019-10-15 09:40
2019-10-11 2019-10-11 09:40
2019-10-08 2019-10-08 09:40
2019-10-04 2019-10-04 09:40
2019-10-01 2019-10-01 09:40
2019-09-27 2019-09-27 09:40
2019-09-24 2019-09-24 09:40
2019-09-20 2019-09-20 09:40
2019-09-17 2019-09-17 09:40
2019-09-13 2019-09-13 09:40
2019-09-10 2019-09-10 09:40
2019-09-06 2019-09-06 09:40
2019-09-03 2019-09-03 09:40
2019-08-30 2019-08-30 09:40
2019-08-27 2019-08-27 09:40
2019-08-23 2019-08-23 09:40
2019-08-20 2019-08-20 09:40
2019-08-16 2019-08-16 09:40
2019-08-13 2019-08-13 09:40
2019-08-09 2019-08-09 09:40
2019-08-06 2019-08-06 09:40
2019-08-02 2019-08-02 09:40
2019-07-30 2019-07-30 09:40
2019-07-26 2019-07-26 09:40
2019-07-23 2019-07-23 09:40
2019-07-19 2019-07-19 09:40
2019-07-12 2019-07-12 09:40
2019-07-09 2019-07-09 09:40
2019-07-05 2019-07-05 09:40
2019-07-02 2019-07-02 09:40
2019-06-28 2019-06-28 09:40
2019-06-25 2019-06-25 09:40
2019-06-21 2019-06-21 09:40
2019-06-18 2019-06-18 09:40
2019-06-14 2019-06-14 09:40
2019-06-11 2019-06-11 09:40
2019-06-07 2019-06-07 09:40
2019-06-04 2019-06-04 09:40
2019-05-31 2019-05-31 09:40
2019-05-28 2019-05-28 09:40
2019-05-24 2019-05-24 09:40
2019-05-21 2019-05-21 09:40
2019-05-17 2019-05-17 09:40
2019-05-14 2019-05-14 09:40
2019-05-10 2019-05-10 09:40
2019-05-07 2019-05-07 09:40
2019-05-03 2019-05-03 09:40

Almanac parameters

The following table provides a description of the different parameters included in the Galileo almanac.

Parameter

Field in XML file

Definition

Units

SVID

SVID

Satellite ID (1 constellation of 36 satellites)

dimensionless

Δ(a 1/2)

aSqRoot 

Difference with respect to the square root of the nominal semi-major axis (29 600 km)

meters 1/2

e

ecc 

Eccentricity

dimensionless

δi

deltai 

Inclination at reference time relative to i0 = 56º

semi-circles*

Ω0

omega0 

Right ascension

semi-circles*

 .
Ω

omegaDot 

Rate of right ascension

semi-circles/s*

ω

Argument of perigee

semi-circles*

M0

m0 

Satellite mean anomaly at reference time

semi-circles*

af0

af0 

Satellite clock correction bias “truncated”

s

af1

af1 

Satellite clock correction linear “truncated”

s/s

IODa

iod 

Almanac Issue Of Data

dimensionless

t0a

t0a 

Almanac reference time

s

WNa

wna 

Almanac reference Week Number. 

WNa term is a Modulo 4 binary representation of the Galileo System Time Week Number.

week

SVstatus**

statusE5a

statusE5b

statusE1B

Satellite signal health status

dimensionless

* Note that the ‘semi-circle’ is not a SI unit but can be converted as: 1 semi-circle = π radian

** The F/NAV almanac transmitted by the E5a-I component contains the signal health status (E5aHS) coded on 2 bits. The I/NAV almanac transmitted by the E5b-I and E1-B components contains both signal health status (E5bHS) and (E1-BHS) coded on 2 bits each.