IERS Bulletin B (IAU1980) Number 147 

Available downloads

Content

IERS Bulletin B provides current information on the Earth's orientation in the IERS Refence System. This includes Universal Time, coordinates of the terrestrial pole, and celestial pole offsets.
IERS Bulletin B consists of 6 sections:

Section 1:
Five days sampling of section 2 (x, y, UT1R-UTC, UT1R-TAI, dPsi, dEps). Final Bulletin B values over one month and provisional extension over the next three months.

Section 2:
Smoothed values of x, y, UT1-UTC, UT1-UT1R, D, dPsi, and dEps at one-day intervals based on a combination of the series presented in section 6.

Section 3:
Five-day normal values of x, y, UT1-UTC, dPsi, and dEps, and their uncertainties, based on a combination of the series of section 6. New class of robust M-Huber estimators is used in the analysis procedures (Bougeard et al., 2000).

Section 4:
Duration of the day and angular velocity of the earth: Smoothed values of DR and OmegaR, with the same degree of smoothing as UT1R-UTC.

Section 5:
Information on the time scales and announcement of the leap seconds.

Section 6:
Average precision of the individual series contributing to the combination and their agreement with the combination.

Format

ASCII

Format Description

See contents of the data files or
http://hpiers.obspm.fr/eoppc/bul/bulb/explanatory.html [.rtf]

Documentation

See contents of the data files and
http://hpiers.obspm.fr/eoppc/bul/bulb/explanatory.html [.rtf]

Title

IERS Bulletin B (IAU1980) Number 147

Data

Section 1: Month [mmm], Day [dd], MJD, x ["], y ["], UT1R-UTC [s], UT1R-TAI [s], dPsi [0.001"], dEps [0.001"]

Section 2: Month [mmm], Day [dd], MJD, x ["], y ["], UT1-UTC [s], UT1-UT1R [ms], D [ms], dPsi [0.001"], dEps [0.001"]

Section 3: Month [mmm], Day [dd], MJD, x ["], y ["], UT1-UTC [s], dPsi [0.001"], dEps [0.001"], and their uncertainties

Section 4: Month [mmm], Day [dd], MJD, DR [s], OmegaR [microrad/s]

Section 5: UTC-TAI [s], DUT1 [s]

Section 6: x [0.001"], y [0.001"], UT1 [0.0001s], D, dPsi [0.001"], dEps [0.001"], Number of points

Data Points

Section 1: 25
Section 2: 61
Section 3: 13
Section 4: 7
Section 5: 0

Time Start

Section 1: 2000-02-29
Section 2: 2000-02-29
Section 3: 2000-02-29
Section 4: 2000-02-29

Time End

Section 1: 2000-06-28
Section 2: 2000-04-29
Section 3: 2000-04-29
Section 4: 2000-03-30

Time Interval

Section 1: 5
Section 2: 1
Section 3: 5
Section 4: 5

Accuracy 

Cf. http://hpiers.obspm.fr/eoppc/bul/bulb/explanatory.html and contents of the data files.

Keywords

EOP, monthly, BULLETIN B, Earth orientation parameter, Number 147, IAU1980

Frequency

monthly

Source

http://hpiers.obspm.fr/eoppc/bul/bulb/bulletinb.147

Created by

IERS Earth Orientation Centre

Published by

IERS Earth Orientation Centre

Date

2000-05-05

Contact

services.iers@obspm.fr

Distribution

onLine

E-Mail Subscription

http://hpiers.obspm.fr/eop-pc/products/bulletins/subscription.html OR https://www.iers.org/MainDisp.csl?pid=57-23

Number

147