| Date: | 2014-12-01 14:01:01 | |
| Sender: | Antonio Pazos <pazos@roa.es> | |
| Subject: | [SLR-Mail] No.2282: 7824 SFEL : San Fernando SRL station | |
| Author: | unknown | |
| Content: | Dear colleagues: San Fernando SLR station (SFEL 7824) uploaded data files since Jun 12 to Aug 8, 2014 are affected by an error due a wrong measurement in the distance from the telescope cross axis to the calibration target. The reported distance was 444 cm while the true one is 451 cm. A +233 ps biass should be applied for this period When trying to fix the error we made a new one affecting the data files uploaded since Aug 8, because we had not into account the calibration target angular displacement. So the used distance was 462 cm, but not the above mentioned 451. In this case the biass to apply must be -367ps. We have modified paragraph 8.04 in the SFEL log file to clarify this problem. Since this night, 02/12/2014 00:00:00.00, we´ll apply the new value 451 cm. We apologize for the inconveniences caused by these errors (in the attached file you can find an extract of the upload data file) Best regards -- ========================================== Dr. CF. Antonio A. Pazos GarcÃa Jefe de la Sección de GeofÃsica/Head of the Geophysical Department Real Instituto y Observatorio de la Armada C/ Cecilio Pujazón s/n 11.100 San Fernando (SPAIN) Phone: +34 956 54 52 94 Fax: +34 956 59 93 66{ tf1ansiansicpg1252deff0deflang3082{fonttbl{f0fnilfcharset0 Courier New;}{f1fswissfcharset0 Arial;}} {*generator Msftedit 5.41.15.1507;}viewkind4uc1pardf0fs20par par CAMBIOS DEL LOGpar par 6.01.03 Primary Chainpar Wavelength [nm]: 532par Detector Type : C-SPADpar Manufacturer : PESO Consulting/Grazpar Model : par Quantum Efficiency [%]: 20par Nominal Gain : par Rise Time [ps]: <2400par Jitter (Single PE)[ps]: <30par Field of View [”]: 40-60par Date Installed : 2001-01-24par Date Removed : (yyyy-mm-dd)par Signal Processing : CFDpar Manufacturer : Tennelec (start only)par Model : TC454par Date Installed : 2014-09-30par Date Removed : (yyyy-mm-dd)par Amplitude Measurement : NOpar Return-rate Controlled: NOpar Mode of Operation : Single to Multi Photonpar Time of Flight Observ. : INTERVALpar Manufacturer : Stanford Researchpar Model : SR 620ipar Resolution [ps]: 4par Precision [ps]: 30par Date Installed : 2001-08-10par Date Removed : (yyyy-mm-dd)par Additional Information : Since 2014-09-30 the TENNELEC TC454 was replaced by same modelpar f1par f0 8.04 Calibration Type : PRE+POSTpar Target Location : EXTERNALpar Target Type : Optical squarepar Target Structure : Mirrorspar Target Distance [m]: 2.255par Date Measured : 2014-06-12par Accuracy (mm) [mm]: 2par Verification : Nopar Return-rate Controlled : NOpar Mode of Operation : Single to Multi Photonspar Average Cal Interval [min]: 60par Single Shot RMS [mm]: 8par Edit Criterion 1st Chain : ITERATIVE 2.5 SIGMApar Edit Criterion 2nd Chain : N.A.par Application of Cal Data : AVERAGEpar Date Installed : 2014-06-12par Date Removed : (yyyy-mm-dd)par Additional Information : From 2014-06-12 to 2014-12-01 target distance had an measure error.par ab ab ab ab ab : From 2014-06-12 to 2014-08-16 a bias must be applied (+ 233 ps).par ab ab ab ab ab : From 2014-08-17 to 2014-12-01 a bias must be applied (- 367 ps).par abpar f1par } |