The strategy initially focuses on the installation of a pilot station consisting of a bottom pressure to demonstrate the viability of a permanent cal/val site for satellite altimetry. The general idea was that the same quality-controlled data had to be re-usable for as many purposes as possible taking into account that in situ monitoring is an expensive activity. The sites for potential installation along the surrounding coasts of Baku were inspected in detail during the previous visit in September 2007. We determined that the pier location at Absheron port (Fig. 3-5) represented the best available place to site the station. The location offers safe and good protection from harsh conditions for the measuring equipment with the possibility of data logging and transmission system to be housed somewhere. In addition, a sea level gauge in Absheron could also provide useful measurements to the local port authority.
 
Fig.5. View of a pier at Port Absheron and installation site (shown by arrow).
Рис.5. Место установки измерительного комплекса на пирсе Апшеронского порта (указано стрелкой).
The works were done between June 8, 2008 and June 13, 2008 in excellent weather conditions with calm sea and variable winds through the period. The material (see Table 1) was airlifted in advance and was stored at Port Absheron. The bottom pressure recorder was deployed at a depth of about 5 m without any difficulty by Michel Calzas. A scheme of the final installation is illustrated in Fig. 6. The field activities are documented through a series of high resolution pictures, some of them shown in Fig.7-8. We made two independent data acquisitions: (1) duration of 68 hours with a sampling rate 10 minutes and averaging interval of 40 second with single measurement every 1 second; (2) duration of 2 hours with a sampling rate of 1 minute and an averaging interval of 10 seconds with single measurements every 1 second. The final operational setting was a sampling rate of 5 minutes with an averaging interval of 40 seconds with single measurements every 1 second. Due to the duration of the internal battery, we will be able to collect around one year of data.
Fig.6. Schema illustrating the bottom pressure installation.
Рис.6. Схема установки измерительного комплекса на пирсе Апшеронского порта.
Table 1. List of material (Список оборудования).
1 wooden box 68x73x27 cm 90 kg containing:
1 pressure gauge, model RBR with XR-420 CTD (www.rbr-global.com), made in Canada
1 electrical cable (length of 30 meters)
1 battery Sonnenschein 12 V / 25 Ah
1 small box with working tools
1 black Pelicase 43x53x22 cm 15 kg containing:
1 GPS Receiver, model TOPCON GB100 (www.topcon.com), made in US and accessories
1 black Pelicase 43x53x22 cm 15 kg containing:
1 GPS Receiver, model TOPCON GB100 (www.topcon.com), made in US and accessories
1 GPS lifebuoy 65x65x20 cm 1 kg
Laptop Windows XP with rs-232
RBR Software v 6.01
RBR XR-420 CTD Sensor features
Temperature
Range: -5˚C to 35˚C
Accuracy: ±0.002˚C
Resolution: <0.00005˚C
Time Constant: ~3 sec and ~20 sec (internal)
Drift: <0.002˚C/year
Depth
Range: 100m (dBar)
Accuracy: ±0.05% full scale
Resolution: <0.001% full scale
Time Constant: <10 msec
Conductivity
Range: 0 – 70 mS/cm
Accuracy: ±0.003 mS/cm at 35psu 15˚
Drift: ~0.001 mS/cm/˚ compensated in s/w
Resolution: Up to 0.0001 mS/cm
Time Constant: ~0.1 sec depending on flow rate
Lifetime: for a Sampling every 5 minutes with 40 s averaging (every 1 s): 1,3 year at 0°C
Fig.7. Photo-report on field activities.
Рис.7. Фоторепортаж о проведенных работах.
Fig.8. Photo-report on field activities.
Рис.8. Фоторепортаж о проведенных работах.
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