Subject: [IGSMAIL-182] GUIDELINES FOR ANNUAL REPORT
From: Najat ESSAIFI
Date: 26 Jan 1993 00:00:00

From:     Najat ESSAIFI
Subject:  GUIDELINES FOR ANNUAL REPORT
--------------------------------------

RFC-822-HEADERS:
X-Vms-To: @ADRESRA92

==================

		INTERNATIONAL   EARTH   ROTATION   SERVICE   (IERS) 
    	SERVICE   INTERNATIONAL   DE   LA   ROTATION   TERRESTRE

BUREAU CENTRAL DE L'IERS
OBSERVATOIRE DE PARIS 
61, Av. de l'Observatoire 75014 PARIS (France)
Tel. (33) 1-40 51 22 26      Telex : 270776 OBS
Internet	: [email-masked]
Span 		: IAPOBS::IERS
FAX  		: (33) 1 - 40 51 22 32

            			Paris, 1993 January 26

**************************************************************
	Dear

	You are invited to submit earth orientation 
	results to the Central Bureau of IERS. Guidelines 
	are enclosed in this mail.

			Thank you for your cooperation.
                        Essaifi Najat  ([email-masked])

**************************************************************

1 - Meet the deadline : 15 March 1993
======================================

	IERS cannot guarantee that any result received after the deadline will 
be considered in the 1992 Annual Report analysis.

2 - Describe your analysis 
============================

	Refer to the IERS Standards (1992) and point out the significant 
departures of your models and constants from them. Give relevant information 
on the data treated. Refer to existing publications for the methods. The precision 
in most of the results is around 0.001" and, at this level, every detail is 
important.

3 - Follow the guidelines
==========================

	Prepare the summary sheet for the terrestrial system. Try to follow 
the proposed formats, or at least provide the full information requested. The 
guidelines and formats are similar to those sent last year. You should not neglect 
the correlation coefficients that we request. Provide all results obtained in the 
adjustment that pertain to the reference frames or to the EOP, including 
precession-nutation results.

4 - Send a copy to the Technique Coordinator
=============================================

	IERS organisation is such that the activities and analyses are 
coordinated within each observing technique. It is therefore essential that the 
yearly submissions of the Analysis Centres be examined by the IERS 
Coordinators. For this reason you are asked to send to the relevant technique 
coordinator a copy of the files sent to the Central Bureau. The addresses of the 
Coordinators can be found in the IERS Annual Report.

5 - Alternate solutions are welcome
======================================

	To permit accurate comparison and combination of results, it is 
necessary that your main analysis follows the common conventions. However, 
additional solutions, with alternate treatment of some aspects, e.g. site 
displacements or celestial pole motion, that would help to better understand the 
phenomena involved, would be welcome.

	Your help in these matters is highly appreciated.

-----------------------------------------------------------------------------

                       DEADLINE : 1993 MARCH 15!

GUIDELINES FOR SUBMITTING EARTH ORIENTATION RESULTS TO IERS

The submission should include the following.
=============================================

1 -	A description of the analysis method. The recommended constants and 
models are those in the IERS Standards (1992). Deviations from them 
should be clearly indicated.

2 -	A series of the Earth Orientation Parameters (EOP) : coordinates of the 
terrestrial pole, universal time, and the celestial pole offsets with respect to 
the direction defined by the IAU precession/nutation. Use preferably the 
attached format (1).

3 -	The set of station coordinates in the terrestrial frame to which the series of 
EOP is referred, see attachment 2.

4 -	The summary sheet (attachment 3) describing the terrestrial system attached 
to the set of station 	coordinates. This document has been issued by the IAG 
Special Study Group 5.123 (Chairman : 	C. Boucher).

5 -	In the case of VLBI, the set of radio sources coordinates in the celestial 
frame to which the series of EOP is referred, preferably under the attached 
format (4).

Transmission means (in decreasing order of preference)
========================================================

	- SPAN 		:	IAPOBS::IERS.

	- INTERNET 	:	[email-masked].
	
	- FLOPPY DISK	:	PC format : ASCII files prefered
				with 5.25" (360 ko or 1.2 Mo) or with 
                                3.5"(720 ko or 1.44 Mo)

				Macintosh format: ASCII files prefered
				with 3.5"   (800 ko or 1.44 Mo).

	- G.E. MARK3	:	In the RC28 catalog, with a QUIK-COM 
                                 message to IERS-CB.

	- MAGNETIC TAPE	: 	1600/6250 bpi, ASCII/EBCDIC, fixed 
                                blocked, no label.

.............................................................................

                              ATTACHMENT 1

       FORMAT FOR TRANSMITTING SERIES TO THE CENTRAL BUREAU OF IERS

FORMAT OF EARTH ORIENTATION		  ! FORMAT OF EARTH ORIENTATION FROM GPS 
					  ! (identical to the 1992'IGS Campaign one)
                                          !
Field	Contents                          !  Field	Contents 
(fields separated by one blank)	          !  (fields separated by one blank)	
                                          !
  1	MJD of the measurement		  !  1	MJD of the measurement
  2	x of the pole (")	          !  2	x of the pole (")
  3	y of the pole (")	          !  3	y of the pole (")
  4	UT1-UTC (s)		          !  4	UT1-UTC (s)
  5(2)	dy (0.001")			  !  5	uncertainty on x (")
  6(2)	de  (0.001")			  !  6	uncertainty on y (")
  7	uncertainty on x (")		  !  7	uncertainty on UT (s)
  8	uncertainty on y (")		  !  8	rms residual of the least  squares 
  9	uncertainty on UT (s)          	  !     solution providing the EOP 
10	uncertainty on dy (0.001")	  !  9	correlation coefficient : x, y
11	uncertainty on de (0.001")	  ! 10	correlation coefficient : x, UT1
12	rms residual of the least squares ! 11	correlation coefficient : y, UT1
	solution providing the EOP 	  ! 12	number of contributing stations
13	correlation coefficient : x, y	  ! 13	number of contributing satellites
14	correlation coefficient : x, UT1  ! 14	number of passes
15	correlation coefficient : y, UT1  ! 15	time span
16	correlation coefficient : dy, de  !
17(3)	integer key (e.g., station,       !
        baseline, sub-network)            !
18(3)	integer key (e.g., Lunar reflector)!

Notes : 
	1 - All the 18 fields MUST BE FILLED (with 0 in the case when no 
information is available for a given field). The numbers of decimals given in 
fields 2-11 should be such that the uncertainties have at least two significant 
digits.
	
	2 - If dy et de were held fixed to an a priori value for some date, this date 
and the a priori value should be given in the general explanation.
	
	3 - Contents to be decided by the analysis centre, e.g., station, baseline, 
sub-network lunar reflector, number of contributing stations, etc.

FORMAT OF UT0 AND LATITUDE (dphi) 

  1	ID of the series
  2	MJD
  3	x (.001")     a priori pole coordinates used for the solution (if applicable)
  4	y (.001")     a priori pole coordinates used for the solution (if applicable)
  5	UT0-UTC   (ms)		as determined in the solution
  6	Dphi (.001")	        as determined in the solution
  7	sigma on UT0-UTC   (ms)
  8	sigma on dphi    (.001")
  9	correlation coefficient between the parameters determined (UT0, dphi)
 10	number of normal points in the solution
 11	time span between the first and the last normal points used (hrs)
 12	rms of the residuals after the solution (ns)
 13	dUT0/dx in arcsec per arcsec
 14	dUT0/dy in arcsec per arcsec
 15	integer key (e. g., station, baseline)
 16	integer key (e. g., Lunar reflector)

.............................................................................

                            ATTACHMENT 2 	

It is recommended to submit as much information as possible 
concerning the station coordinates. 

This information should contain: 

A) general description of the solution (common with other IERS 
products),
 
B) specific description concerning the terrestrial system, following if 
possible the Attachment 3,

C) description of the station coordinate information (format, 
significance of data items) 

D) data set as described in C. 

The important point  is that we would like to get the complete 
information you will have produced concerning SSC, for instance if 
you have adjusted velocities, or time series of station coordinates. 

We can also accept full variance-covariance matrix for these 
parameters. 

The description in C should in particular contain a list of parameters 
with description and unit (for instance : X at  1988.0, in meter; or 
velocity in latitude, in mm per year). 

The variance-covariance information should also include the description 
of the coefficients (variances or standard deviations, covariances or 
correlation parameters) and also specify if and how the variance matrix 
has been scaled. 

When sending only coordinates, the usual DOMES format as given 
below can be used, but it is not mandatory. 

Finally, we would really appreciate it that the SLR analysis centers to 
help us in the identification of the points to which their coordinates are 
related. For that, two cases of tracking points exist : 

   - fixed  SLR system : in this case the coordinates are related to the IAR
    (ex. Grasse fixed system CDP 7835). Here, there is no particular problem. 
   - mobile SLR system : in this case, please tell us if you use eccentricities  
     between  IAR and a ground reference mark and give the description and the 
     number of the reference mark.  

Also we would appreciate it if you could supply us with the values of 
these eccentricities. On  the other hand, if the eccentricities are not 
available to you, please let us know for each point the occupancy you 
use by giving the CDP occupation designator (ex. Greenbelt  
71050711)  or/and the occupation name (ex. ML0711).

For more details and before sending information, don't  hesitate to 
contact  the IERS Terrestrial  Frame Section (Claude Boucher or Zuheir 
Altamimi) : 

	SPAN	        : 	IAPOBS::BIHTERRE
	INTERNET	:	[email-masked] or [email-masked]
	TELEMAIL	:	C.BOUCHER
	G. E. MARK3     :	IERS - CB
	FAX		:	33 1 43 98 80 53
	TELEX    	:	261631

Conversely, we would appreciate to identify the person to contact, 
particularly for terrestrial reference system aspects.

Proposed format for station coordinates

(Field)      (Columns)               (Value)

    1                 1	         	X
    2               2-6        	DOMES site number
    3                 7	        DOMES type of point (M or S)
    4               8-10      	DOMES point number
    5              11-20      	Alternate designation
    6              21-33      	X, in metres, decimal point in column 30
    7              34-46      	Y, in metres, decimal point in column 43
    8              47-59      	Z, in metres, decimal point in column 56
    9              61-67      	Central epoch of adjusted observations (MJD,
                              	precision 0.1d, decimal point in column 66)
  10              69-75      	Time span of ajusted observations (days,
                       		precision 0.1d, decimal point in column 74)
  11              81-86      	SIG X, in metres, decimal point in column 83
  12              88-93      	SIG Y, in metres, decimal point in column 90
  13              95-100      	SIG Z, in metres, decimal point in column 97

.............................................................................

                            ATTACHEMENT 3

        SUMMARY SHEET FOR THE DESCRIPTION OF THE TERRESTRIAL SYSTEM 
   
                ATTACHED TO A SET OF STATION COORDINATES

  1 - Technique :

  2 - Analysis Center :

  3 - Solution identifier : 

  4 - Software used : 

  5 - Relativity Scale : 

  6 - Permanent tidal correction on station :

  7 - Tectonic plate model : 

  8 - Velocity of light (C) :

  9 - Geogravitational constant (GMo) :

10 - Reference epoch :

11 - Adjusted parameters : 

12 - Definition of the origin : 

13 - Definition of the orientation : 

14 - Constraint for time evolution :

.............................................................................

                              ATTACHEMENT 4

         FORMAT FOR TRANSMITTING SETS OF RADIOSOURCE COORDINATES 
                      TO THE IERS CENTRAL BUREAU.	

Field		Contents  all fields separated by one blank (1)

  1			IAU name
  2			Alternate name
  3			hours of right ascension (2)
  4			minutes of right ascension (2)
  5			seconds of right ascension (2)
  6			degrees of declination (3)
  7			minutes of declination (3)
  8			seconds of declination (3)
  9			uncertainty on right ascension (s)
 10			uncertainty on declination (")
 11			correlation : right ascension, declination
 12			epoch of coordinates (MJD)
 13			mean date of observations of the source (MJD)
 14			time span of observations of the source (days)
 15			number of sessions
 16			number of delays
 17			number of delay rates

Notes

1 - All the 17 fields should be filled (with 0 when the information is lacking).

2 - These three fields can be replaced by one field, giving the right ascensions in 
degrees and decimal fraction (from 0. to 360.)

3 - These three fields can be replaced by one field, giving the declination in 
degrees and decimal fraction (from -90. to +90.).