GAMB Procedure for automatic VLBI group ambiguities resolution. Description of menu items. (H) -- Put on-line help one the screen, which you are reading just now. (B) -- If you have only database in oborg area scratch file you can make automatic group delay resolution only for this database. If you have two databases: X- and S- for the same experiment in oborg ares you have option to analyze X-band database, S-band database or to analyze them together (combined). Hitting key you can cyclically change setup. (G) -- You can use all available observations or only good one. "Good" means that observations rejected during previous SOLVE analysis will not be used. When only one database is analyzed and ionosphere calibration is not recalculated "all" means all observations except those with quality code less than QUALCODE_GOOD_LIM. If ionosphere calibration is recalculated then observations which have with quality code less than QUALCODE_GOOD_LIM on opposite band will be automatically rejected for both databases before analysis (IUNW=8 or 5) (S) -- GAMB saves results of its works in normal mode: it updates oborg area scratch files for databases used: number of ambiguities, information about outliers and (optionally) ionosphere calibration. You may prohibit changes of oborg area. In that case results of GAMB will disappear after finishing program. (I) -- In the case when two databases loaded in scratch file GAMB analyzes two bands simultaneously and it recalculates ionosphere calibration. In this mode GAMB will reject observations marked as outliers for opposite band. In this mode GAMB will also transfer some information for X-band to S-band oborg area of scratch files. User can prohibit this mode. (M) -- If baseline contains less than specified limit observation it will not be analyzed and will be rejected beforehand. If during analysis the number of good observations become less than this limit all observations will be rejected and unweight flag IUNW=1 will be set up. You can enter this limit in range [4, 1000]. Recommended value is 8. (C) -- Ambiguity spacing. As default ambiguity spacing is set up by DBEDIT and is reciprocal minimal channels spacings. You can change it manually. But I don't recommend you to do it unless you have very serious grounds to do it!! (L) -- If the deviation an observation from second order polynomial clock model after ambiguities resolution will be larger in module than cutoff limit the observation will be rejected from estimation and marked as outlier (flag IUNW=1 will be set up). You can enter cutoff limit in range [0.1, 1000.0] nsec. This value shouldn't be less than 2 nsec from one hand and larger than 30% of ambiguity spacing form the other hand. Recommended value is 5 nsec. (Q) -- Observations with quality code less than specified code will be marked as outliers before work of GAMB. If ionosphere calibration is calculated the observation will be marked as outlier if matched observation at the opposite band has bad quality code. Quality code limit may be in the range [1, 9]. Recommended value is 5. (A) -- When user hits "A" or at the field of this option GAMB will start to work. (V) -- Verbosity mode. 0 -- means silent mode. No messages will be printed at the screen except error messages. 1 -- total RMS and judgment about goodness will be printed. 2 -- RMS values for baselines and more verbose analysis of goodness of the solution will be printed. 3 -- r.m.s. for pre-pre-estimation are printed. 4 -- clock parameters, errors of clock shift triangles closures and permanent baseline dependent ambiguities are printed. 5-6 -- debugging mode. Lists of objects will be printed if verbosity mode 5 is setup. Pre-fit "raw" o-c for the first baseline and values of obtained clock jumps due to the ambiguities and values of post-fit o-c for all baselines are printed at the screen when verbosity mode 6 is set up. All information displayed at the screen is also printed in spool file. Recommended value is 2. (A) -- When user hit "O" or at the field of this option GAMB will finish its work and OPTIN will be called back. (R) -- GAMB will rewrite screen if user hit "R" key.