# Instructions ------------ 1. Install the latest version of VieVS. 2. Copy the following files into their respective VieVS folders (see description below): - vgosDb files - Outlier files - OPT files - Parameter file 3. Open VieVS and: - Load the vgosDb files. - Select the parameter file: VIE_int_vgosdb.mat. - Check the boxes: Use OPT files and Eliminate outliers. - Navigate to: Models --> Reference Frames --> Terrestrial Reference Frame, and select the frame: itrf202_u2023. 4. Set up processing: - Go to: Run --> Run options --> Sub-directory (intermediate results) - Specify your working sub-directory (e.g., 2025_04_29_A) 5. Run the processing in VieVS. 6. Export results: - Go to: Plotting --> EOP/BAS out --> Write to file - Select: "eopi file (intensives)" - The file is typically saved in: VieVS/VLBI/OUT/<2025_04_29_A.eopi> # Research Questions ------------------ - What is the relationship between the UCA and the dUT1 estimates? - What is the precision of the dUT1 estimates, and at what point does the UCA introduce a significant systematic bias? - Is dUT1 the only parameter affected? If not, why? - Which data in the vgosDb file is impacted by changes in the UCA? (Tip: Use MATLAB functions such as ncdisp and ncread to inspect the NetCDF files.) # Support ------- - For VieVS usage: contact Sigrid B. - For dataset- or research-related questions: contact Jakob G. or Sigrid B. # vgosDb: source: https://www.vlbi.at/data/correlation/public/hartl/vgosDb/ session: 2025-0115-vo5015 (https://ivscc.gsfc.nasa.gov/sessions/2025/vo5015/) data format: VGOS Database (vgosDb) time span: the first 800 scans of vo5015 are included in the vgosDb stored here, corresponding to 2025-01-15, 00:00 to 05:40 (~5.7 hours) description of data bases: 20250115-vo5015-.tgz: 20250115-vo5015-0.tgz 20250115-vo5015-1.tgz 20250115-vo5015-10.tgz 20250115-vo5015-2.tgz 20250115-vo5015-3.tgz 20250115-vo5015-4.tgz 20250115-vo5015-5.tgz 20250115-vo5015-6.tgz 20250115-vo5015-7.tgz 20250115-vo5015-8.tgz 20250115-vo5015-9.tgz naming id, universal clock adjustment (usec), comment 0, -10.0 1, -1.0 2, -0.1 3, -0.01 4, -0.001 5, 0.001 6, 0.01 7, 0.1 8, 1.0 9, 10.0 10, 0.0, original # Outliers (.OUT) source: https://www.vlbi.at/data/correlation/public/hartl/OUTLIER/ 20250115-vo5015-0.OUT 20250115-vo5015-1.OUT 20250115-vo5015-10.OUT 20250115-vo5015-2.OUT 20250115-vo5015-3.OUT 20250115-vo5015-4.OUT 20250115-vo5015-5.OUT 20250115-vo5015-6.OUT 20250115-vo5015-7.OUT 20250115-vo5015-8.OUT 20250115-vo5015-9.OUT # Configuration files used to define and control various options (.OPT) source: https://www.vlbi.at/data/correlation/public/hartl/OPT/ 20250115-vo5015-0.OPT 20250115-vo5015-1.OPT 20250115-vo5015-10.OPT 20250115-vo5015-2.OPT 20250115-vo5015-3.OPT 20250115-vo5015-4.OPT 20250115-vo5015-5.OPT 20250115-vo5015-6.OPT 20250115-vo5015-7.OPT 20250115-vo5015-8.OPT 20250115-vo5015-9.OPT # Parameter files (.mat) source: https://www.vlbi.at/data/correlation/public/hartl/PARAMETERS/ VIE_int_vgosdb.mat Description: Ask Sigrid for parameterization. # Clock parameters for VLBI raw data processing, specified in the vo5015.vex file that is used for correlation with DiFX. Other than that all configuration parameters are identical between the 10 versions. clock_uca_0.vex (-10 usec): def Gs; clock_early = 2025y015d00h00m00s : -122.504 usec : 2025y015d00h00m00s : -5.053067e-12; enddef; def Hb; clock_early = 2025y015d00h00m00s : 18.966 usec : 2025y015d00h00m00s : -2.686142e-13; enddef; def Hv; clock_early = 2025y015d00h00m00s : -6.938 usec : 2025y015d00h00m00s : -1.457133e-13; enddef; def Is; clock_early = 2025y015d00h00m00s : 1.155 usec : 2025y015d00h00m00s : -1.438159e-14; enddef; def K2; clock_early = 2025y015d00h00m00s : 3.261 usec : 2025y015d00h00m00s : 8.223634e-14; enddef; def Ke; clock_early = 2025y015d00h00m00s : 21.196 usec : 2025y015d00h00m00s : 3.535558e-13; enddef; def Mg; clock_early = 2025y015d00h00m00s : 19.549 usec : 2025y015d00h00m00s : -1.173912e-12; enddef; def Nn; clock_early = 2025y015d00h00m00s : 7.247 usec : 2025y015d00h00m00s : 4.118283e-13; enddef; def Oe; clock_early = 2025y015d00h00m00s : -133.421 usec : 2025y015d00h00m00s : -6.557256e-13; enddef; def Ow; clock_early = 2025y015d00h00m00s : -133.452 usec : 2025y015d00h00m00s : -6.129608e-13; enddef; def Sa; clock_early = 2025y015d00h00m00s : -8.022 usec : 2025y015d00h00m00s : -8.608364e-15; enddef; def Wf; clock_early = 2025y015d00h00m00s : -9.208 usec : 2025y015d00h00m00s : 0.000000e+00; enddef; def Wn; clock_early = 2025y015d00h00m00s : -8.715 usec : 2025y015d00h00m00s : 2.710713e-14; enddef; def Ws; clock_early = 2025y015d00h00m00s : -9.126 usec : 2025y015d00h00m00s : 1.596314e-14; enddef; clock_uca_1.vex (-1 usec): def Gs; clock_early = 2025y015d00h00m00s : -113.504 usec : 2025y015d00h00m00s : -5.053067e-12; enddef; def Hb; clock_early = 2025y015d00h00m00s : 27.966 usec : 2025y015d00h00m00s : -2.686142e-13; enddef; def Hv; clock_early = 2025y015d00h00m00s : 2.062 usec : 2025y015d00h00m00s : -1.457133e-13; enddef; def Is; clock_early = 2025y015d00h00m00s : 10.155 usec : 2025y015d00h00m00s : -1.438159e-14; enddef; def K2; clock_early = 2025y015d00h00m00s : 12.261 usec : 2025y015d00h00m00s : 8.223634e-14; enddef; def Ke; clock_early = 2025y015d00h00m00s : 30.196 usec : 2025y015d00h00m00s : 3.535558e-13; enddef; def Mg; clock_early = 2025y015d00h00m00s : 28.549 usec : 2025y015d00h00m00s : -1.173912e-12; enddef; def Nn; clock_early = 2025y015d00h00m00s : 16.247 usec : 2025y015d00h00m00s : 4.118283e-13; enddef; def Oe; clock_early = 2025y015d00h00m00s : -124.421 usec : 2025y015d00h00m00s : -6.557256e-13; enddef; def Ow; clock_early = 2025y015d00h00m00s : -124.452 usec : 2025y015d00h00m00s : -6.129608e-13; enddef; def Sa; clock_early = 2025y015d00h00m00s : 0.978 usec : 2025y015d00h00m00s : -8.608364e-15; enddef; def Wf; clock_early = 2025y015d00h00m00s : -0.208 usec : 2025y015d00h00m00s : 0.000000e+00; enddef; def Wn; clock_early = 2025y015d00h00m00s : 0.285 usec : 2025y015d00h00m00s : 2.710713e-14; enddef; def Ws; clock_early = 2025y015d00h00m00s : -0.126 usec : 2025y015d00h00m00s : 1.596314e-14; enddef; clock_uca_2.vex (-0.1 usec): def Gs; clock_early = 2025y015d00h00m00s : -112.604 usec : 2025y015d00h00m00s : -5.053067e-12; enddef; def Hb; clock_early = 2025y015d00h00m00s : 28.866 usec : 2025y015d00h00m00s : -2.686142e-13; enddef; def Hv; clock_early = 2025y015d00h00m00s : 2.962 usec : 2025y015d00h00m00s : -1.457133e-13; enddef; def Is; clock_early = 2025y015d00h00m00s : 11.055 usec : 2025y015d00h00m00s : -1.438159e-14; enddef; def K2; clock_early = 2025y015d00h00m00s : 13.161 usec : 2025y015d00h00m00s : 8.223634e-14; enddef; def Ke; clock_early = 2025y015d00h00m00s : 31.096 usec : 2025y015d00h00m00s : 3.535558e-13; enddef; def Mg; clock_early = 2025y015d00h00m00s : 29.449 usec : 2025y015d00h00m00s : -1.173912e-12; enddef; def Nn; clock_early = 2025y015d00h00m00s : 17.147 usec : 2025y015d00h00m00s : 4.118283e-13; enddef; def Oe; clock_early = 2025y015d00h00m00s : -123.521 usec : 2025y015d00h00m00s : -6.557256e-13; enddef; def Ow; clock_early = 2025y015d00h00m00s : -123.552 usec : 2025y015d00h00m00s : -6.129608e-13; enddef; def Sa; clock_early = 2025y015d00h00m00s : 1.878 usec : 2025y015d00h00m00s : -8.608364e-15; enddef; def Wf; clock_early = 2025y015d00h00m00s : 0.692 usec : 2025y015d00h00m00s : 0.000000e+00; enddef; def Wn; clock_early = 2025y015d00h00m00s : 1.185 usec : 2025y015d00h00m00s : 2.710713e-14; enddef; def Ws; clock_early = 2025y015d00h00m00s : 0.774 usec : 2025y015d00h00m00s : 1.596314e-14; enddef; clock_uca_3.vex (-0.01 usec): def Gs; clock_early = 2025y015d00h00m00s : -112.514 usec : 2025y015d00h00m00s : -5.053067e-12; enddef; def Hb; clock_early = 2025y015d00h00m00s : 28.956 usec : 2025y015d00h00m00s : -2.686142e-13; enddef; def Hv; clock_early = 2025y015d00h00m00s : 3.052 usec : 2025y015d00h00m00s : -1.457133e-13; enddef; def Is; clock_early = 2025y015d00h00m00s : 11.145 usec : 2025y015d00h00m00s : -1.438159e-14; enddef; def K2; clock_early = 2025y015d00h00m00s : 13.251 usec : 2025y015d00h00m00s : 8.223634e-14; enddef; def Ke; clock_early = 2025y015d00h00m00s : 31.186 usec : 2025y015d00h00m00s : 3.535558e-13; enddef; def Mg; clock_early = 2025y015d00h00m00s : 29.539 usec : 2025y015d00h00m00s : -1.173912e-12; enddef; def Nn; clock_early = 2025y015d00h00m00s : 17.237 usec : 2025y015d00h00m00s : 4.118283e-13; enddef; def Oe; clock_early = 2025y015d00h00m00s : -123.431 usec : 2025y015d00h00m00s : -6.557256e-13; enddef; def Ow; clock_early = 2025y015d00h00m00s : -123.462 usec : 2025y015d00h00m00s : -6.129608e-13; enddef; def Sa; clock_early = 2025y015d00h00m00s : 1.968 usec : 2025y015d00h00m00s : -8.608364e-15; enddef; def Wf; clock_early = 2025y015d00h00m00s : 0.782 usec : 2025y015d00h00m00s : 0.000000e+00; enddef; def Wn; clock_early = 2025y015d00h00m00s : 1.275 usec : 2025y015d00h00m00s : 2.710713e-14; enddef; def Ws; clock_early = 2025y015d00h00m00s : 0.864 usec : 2025y015d00h00m00s : 1.596314e-14; enddef; clock_uca_4.vex (-0.001 usec): def Gs; clock_early = 2025y015d00h00m00s : -112.505 usec : 2025y015d00h00m00s : -5.053067e-12; enddef; def Hb; clock_early = 2025y015d00h00m00s : 28.965 usec : 2025y015d00h00m00s : -2.686142e-13; enddef; def Hv; clock_early = 2025y015d00h00m00s : 3.061 usec : 2025y015d00h00m00s : -1.457133e-13; enddef; def Is; clock_early = 2025y015d00h00m00s : 11.154 usec : 2025y015d00h00m00s : -1.438159e-14; enddef; def K2; clock_early = 2025y015d00h00m00s : 13.260 usec : 2025y015d00h00m00s : 8.223634e-14; enddef; def Ke; clock_early = 2025y015d00h00m00s : 31.195 usec : 2025y015d00h00m00s : 3.535558e-13; enddef; def Mg; clock_early = 2025y015d00h00m00s : 29.548 usec : 2025y015d00h00m00s : -1.173912e-12; enddef; def Nn; clock_early = 2025y015d00h00m00s : 17.246 usec : 2025y015d00h00m00s : 4.118283e-13; enddef; def Oe; clock_early = 2025y015d00h00m00s : -123.422 usec : 2025y015d00h00m00s : -6.557256e-13; enddef; def Ow; clock_early = 2025y015d00h00m00s : -123.453 usec : 2025y015d00h00m00s : -6.129608e-13; enddef; def Sa; clock_early = 2025y015d00h00m00s : 1.977 usec : 2025y015d00h00m00s : -8.608364e-15; enddef; def Wf; clock_early = 2025y015d00h00m00s : 0.791 usec : 2025y015d00h00m00s : 0.000000e+00; enddef; def Wn; clock_early = 2025y015d00h00m00s : 1.284 usec : 2025y015d00h00m00s : 2.710713e-14; enddef; def Ws; clock_early = 2025y015d00h00m00s : 0.873 usec : 2025y015d00h00m00s : 1.596314e-14; enddef; clock_uca_5.vex (0.001 usec): def Gs; clock_early = 2025y015d00h00m00s : -112.503 usec : 2025y015d00h00m00s : -5.053067e-12; enddef; def Hb; clock_early = 2025y015d00h00m00s : 28.967 usec : 2025y015d00h00m00s : -2.686142e-13; enddef; def Hv; clock_early = 2025y015d00h00m00s : 3.063 usec : 2025y015d00h00m00s : -1.457133e-13; enddef; def Is; clock_early = 2025y015d00h00m00s : 11.156 usec : 2025y015d00h00m00s : -1.438159e-14; enddef; def K2; clock_early = 2025y015d00h00m00s : 13.262 usec : 2025y015d00h00m00s : 8.223634e-14; enddef; def Ke; clock_early = 2025y015d00h00m00s : 31.197 usec : 2025y015d00h00m00s : 3.535558e-13; enddef; def Mg; clock_early = 2025y015d00h00m00s : 29.550 usec : 2025y015d00h00m00s : -1.173912e-12; enddef; def Nn; clock_early = 2025y015d00h00m00s : 17.248 usec : 2025y015d00h00m00s : 4.118283e-13; enddef; def Oe; clock_early = 2025y015d00h00m00s : -123.420 usec : 2025y015d00h00m00s : -6.557256e-13; enddef; def Ow; clock_early = 2025y015d00h00m00s : -123.451 usec : 2025y015d00h00m00s : -6.129608e-13; enddef; def Sa; clock_early = 2025y015d00h00m00s : 1.979 usec : 2025y015d00h00m00s : -8.608364e-15; enddef; def Wf; clock_early = 2025y015d00h00m00s : 0.793 usec : 2025y015d00h00m00s : 0.000000e+00; enddef; def Wn; clock_early = 2025y015d00h00m00s : 1.286 usec : 2025y015d00h00m00s : 2.710713e-14; enddef; def Ws; clock_early = 2025y015d00h00m00s : 0.875 usec : 2025y015d00h00m00s : 1.596314e-14; enddef; clock_uca_6.vex (0.01 usec): def Gs; clock_early = 2025y015d00h00m00s : -112.494 usec : 2025y015d00h00m00s : -5.053067e-12; enddef; def Hb; clock_early = 2025y015d00h00m00s : 28.976 usec : 2025y015d00h00m00s : -2.686142e-13; enddef; def Hv; clock_early = 2025y015d00h00m00s : 3.072 usec : 2025y015d00h00m00s : -1.457133e-13; enddef; def Is; clock_early = 2025y015d00h00m00s : 11.165 usec : 2025y015d00h00m00s : -1.438159e-14; enddef; def K2; clock_early = 2025y015d00h00m00s : 13.271 usec : 2025y015d00h00m00s : 8.223634e-14; enddef; def Ke; clock_early = 2025y015d00h00m00s : 31.206 usec : 2025y015d00h00m00s : 3.535558e-13; enddef; def Mg; clock_early = 2025y015d00h00m00s : 29.559 usec : 2025y015d00h00m00s : -1.173912e-12; enddef; def Nn; clock_early = 2025y015d00h00m00s : 17.257 usec : 2025y015d00h00m00s : 4.118283e-13; enddef; def Oe; clock_early = 2025y015d00h00m00s : -123.411 usec : 2025y015d00h00m00s : -6.557256e-13; enddef; def Ow; clock_early = 2025y015d00h00m00s : -123.442 usec : 2025y015d00h00m00s : -6.129608e-13; enddef; def Sa; clock_early = 2025y015d00h00m00s : 1.988 usec : 2025y015d00h00m00s : -8.608364e-15; enddef; def Wf; clock_early = 2025y015d00h00m00s : 0.802 usec : 2025y015d00h00m00s : 0.000000e+00; enddef; def Wn; clock_early = 2025y015d00h00m00s : 1.295 usec : 2025y015d00h00m00s : 2.710713e-14; enddef; def Ws; clock_early = 2025y015d00h00m00s : 0.884 usec : 2025y015d00h00m00s : 1.596314e-14; enddef; clock_uca_7.vex (0.1 usec): def Gs; clock_early = 2025y015d00h00m00s : -112.404 usec : 2025y015d00h00m00s : -5.053067e-12; enddef; def Hb; clock_early = 2025y015d00h00m00s : 29.066 usec : 2025y015d00h00m00s : -2.686142e-13; enddef; def Hv; clock_early = 2025y015d00h00m00s : 3.162 usec : 2025y015d00h00m00s : -1.457133e-13; enddef; def Is; clock_early = 2025y015d00h00m00s : 11.255 usec : 2025y015d00h00m00s : -1.438159e-14; enddef; def K2; clock_early = 2025y015d00h00m00s : 13.361 usec : 2025y015d00h00m00s : 8.223634e-14; enddef; def Ke; clock_early = 2025y015d00h00m00s : 31.296 usec : 2025y015d00h00m00s : 3.535558e-13; enddef; def Mg; clock_early = 2025y015d00h00m00s : 29.649 usec : 2025y015d00h00m00s : -1.173912e-12; enddef; def Nn; clock_early = 2025y015d00h00m00s : 17.347 usec : 2025y015d00h00m00s : 4.118283e-13; enddef; def Oe; clock_early = 2025y015d00h00m00s : -123.321 usec : 2025y015d00h00m00s : -6.557256e-13; enddef; def Ow; clock_early = 2025y015d00h00m00s : -123.352 usec : 2025y015d00h00m00s : -6.129608e-13; enddef; def Sa; clock_early = 2025y015d00h00m00s : 2.078 usec : 2025y015d00h00m00s : -8.608364e-15; enddef; def Wf; clock_early = 2025y015d00h00m00s : 0.892 usec : 2025y015d00h00m00s : 0.000000e+00; enddef; def Wn; clock_early = 2025y015d00h00m00s : 1.385 usec : 2025y015d00h00m00s : 2.710713e-14; enddef; def Ws; clock_early = 2025y015d00h00m00s : 0.974 usec : 2025y015d00h00m00s : 1.596314e-14; enddef; clock_uca_8.vex (1 usec): def Gs; clock_early = 2025y015d00h00m00s : -111.504 usec : 2025y015d00h00m00s : -5.053067e-12; enddef; def Hb; clock_early = 2025y015d00h00m00s : 29.966 usec : 2025y015d00h00m00s : -2.686142e-13; enddef; def Hv; clock_early = 2025y015d00h00m00s : 4.062 usec : 2025y015d00h00m00s : -1.457133e-13; enddef; def Is; clock_early = 2025y015d00h00m00s : 12.155 usec : 2025y015d00h00m00s : -1.438159e-14; enddef; def K2; clock_early = 2025y015d00h00m00s : 14.261 usec : 2025y015d00h00m00s : 8.223634e-14; enddef; def Ke; clock_early = 2025y015d00h00m00s : 32.196 usec : 2025y015d00h00m00s : 3.535558e-13; enddef; def Mg; clock_early = 2025y015d00h00m00s : 30.549 usec : 2025y015d00h00m00s : -1.173912e-12; enddef; def Nn; clock_early = 2025y015d00h00m00s : 18.247 usec : 2025y015d00h00m00s : 4.118283e-13; enddef; def Oe; clock_early = 2025y015d00h00m00s : -122.421 usec : 2025y015d00h00m00s : -6.557256e-13; enddef; def Ow; clock_early = 2025y015d00h00m00s : -122.452 usec : 2025y015d00h00m00s : -6.129608e-13; enddef; def Sa; clock_early = 2025y015d00h00m00s : 2.978 usec : 2025y015d00h00m00s : -8.608364e-15; enddef; def Wf; clock_early = 2025y015d00h00m00s : 1.792 usec : 2025y015d00h00m00s : 0.000000e+00; enddef; def Wn; clock_early = 2025y015d00h00m00s : 2.285 usec : 2025y015d00h00m00s : 2.710713e-14; enddef; def Ws; clock_early = 2025y015d00h00m00s : 1.874 usec : 2025y015d00h00m00s : 1.596314e-14; enddef; clock_uca_9.vex (10 usec): def Gs; clock_early = 2025y015d00h00m00s : -102.504 usec : 2025y015d00h00m00s : -5.053067e-12; enddef; def Hb; clock_early = 2025y015d00h00m00s : 38.966 usec : 2025y015d00h00m00s : -2.686142e-13; enddef; def Hv; clock_early = 2025y015d00h00m00s : 13.062 usec : 2025y015d00h00m00s : -1.457133e-13; enddef; def Is; clock_early = 2025y015d00h00m00s : 21.155 usec : 2025y015d00h00m00s : -1.438159e-14; enddef; def K2; clock_early = 2025y015d00h00m00s : 23.261 usec : 2025y015d00h00m00s : 8.223634e-14; enddef; def Ke; clock_early = 2025y015d00h00m00s : 41.196 usec : 2025y015d00h00m00s : 3.535558e-13; enddef; def Mg; clock_early = 2025y015d00h00m00s : 39.549 usec : 2025y015d00h00m00s : -1.173912e-12; enddef; def Nn; clock_early = 2025y015d00h00m00s : 27.247 usec : 2025y015d00h00m00s : 4.118283e-13; enddef; def Oe; clock_early = 2025y015d00h00m00s : -113.421 usec : 2025y015d00h00m00s : -6.557256e-13; enddef; def Ow; clock_early = 2025y015d00h00m00s : -113.452 usec : 2025y015d00h00m00s : -6.129608e-13; enddef; def Sa; clock_early = 2025y015d00h00m00s : 11.978 usec : 2025y015d00h00m00s : -8.608364e-15; enddef; def Wf; clock_early = 2025y015d00h00m00s : 10.792 usec : 2025y015d00h00m00s : 0.000000e+00; enddef; def Wn; clock_early = 2025y015d00h00m00s : 11.285 usec : 2025y015d00h00m00s : 2.710713e-14; enddef; def Ws; clock_early = 2025y015d00h00m00s : 10.874 usec : 2025y015d00h00m00s : 1.596314e-14; enddef; clock_uca_10.vex (0 usec, original): def Gs; clock_early = 2025y015d00h00m00s : -112.504 usec : 2025y015d00h00m00s : -5.053067e-12; enddef; def Hb; clock_early = 2025y015d00h00m00s : 28.966 usec : 2025y015d00h00m00s : -2.686142e-13; enddef; def Hv; clock_early = 2025y015d00h00m00s : 3.062 usec : 2025y015d00h00m00s : -1.457133e-13; enddef; def Is; clock_early = 2025y015d00h00m00s : 11.155 usec : 2025y015d00h00m00s : -1.438159e-14; enddef; def K2; clock_early = 2025y015d00h00m00s : 13.261 usec : 2025y015d00h00m00s : 8.223634e-14; enddef; def Ke; clock_early = 2025y015d00h00m00s : 31.196 usec : 2025y015d00h00m00s : 3.535558e-13; enddef; def Mg; clock_early = 2025y015d00h00m00s : 29.549 usec : 2025y015d00h00m00s : -1.173912e-12; enddef; def Nn; clock_early = 2025y015d00h00m00s : 17.247 usec : 2025y015d00h00m00s : 4.118283e-13; enddef; def Oe; clock_early = 2025y015d00h00m00s : -123.421 usec : 2025y015d00h00m00s : -6.557256e-13; enddef; def Ow; clock_early = 2025y015d00h00m00s : -123.452 usec : 2025y015d00h00m00s : -6.129608e-13; enddef; def Sa; clock_early = 2025y015d00h00m00s : 1.978 usec : 2025y015d00h00m00s : -8.608364e-15; enddef; def Wf; clock_early = 2025y015d00h00m00s : 0.792 usec : 2025y015d00h00m00s : 0.000000e+00; enddef; def Wn; clock_early = 2025y015d00h00m00s : 1.285 usec : 2025y015d00h00m00s : 2.710713e-14; enddef; def Ws; clock_early = 2025y015d00h00m00s : 0.874 usec : 2025y015d00h00m00s : 1.596314e-14; enddef;