(updated: 2016/11/09) 2016 HKW RADAR OPERATION HISTORY 02/25 12 UT - 02/26 00 UT The data were not stored because it was not noticed that the main computer hard disk was full. 03/06 20 UT - 03/08 00 UT The data were not stored because it was not noticed that the main computer hard disk was full. 03/27 - 03/29 Visit to the radar site (Nishitani, Ruohoniemi and Iida). 0501 10 UT - 05/02 08 UT The data were not stored because it was not noticed that the main computer hard disk was full. 08/03 04 UT - 08/10 02 UT THe network to the radar site was cut off. The cause was the wireless LAN relaying device at the pump hut damaged by a thunderstrike. It was replaced with a spare device on 08/10. 09/06 1200 UT to 10/12 05 UT The network to the radar site was cut off. The cause of the problem was not yet identified, but it is most likely due to the water leakage into the connection portion of the cable when there was a heavy rain (durint a thunderstorm). We shielded the portion using self-fusing tape. 09/07-09/10 Visit to the radar site by NIPR / JARE people (radar stopped intermittently). 09/07 Replacement of the TIMENET GPS ntp server, but the ntp server did not work. Then we changed the GPS antenna to the indoor-type one. This time it worked. Probably the antenna was the cause of the problem. The radar switched the ntp server from strik2 to the TIMNET server at 0857 UT on 09/10. 09/10 As a result of checking each transmitter's power using the powermeter, it was found that 4 of them was not emitting any power. We replaced 2 of them with spare transmitters, but 2 of them were not replaced because there were no more spares. They were connected to F4 and F13 (F4 antenna was malfunctional) and switched off. 10/5 0050 UT to 10/7 0611 UT The radar was stopped owing to regular antenna maintenance. F4 antenna was recovered (or more exactly it had no problem this time), but the transmitter connected to it was still switched off because there were no more spares. present status: working normally ---- 2015 HKW RADAR OPERATION HISTORY 2/16 0554 UT chB camping beam mode operation started. 3/28 0908 UT chB camping beam mode operation was stopped. 06/15 It was found that the transmitter #5 had red light turned on. It was replaced with a spare transmitter. 10/08 02 UT - 10/08 22 UT The radar was stopped owing to the sudden power outage following the passage of a typhoon. 10/23 00 UT - 10/23 10 UT The radar was stopped because of radar main computer (dsc200/300 card) malfunctioning (and other reasons related to faulty transmitters). 11/08 06 UT - 12/06 06 UT The radar was stopped because of radar main computer (dsc200/300 card) malfunctioning (and other reasons related to faulty transmitters). 12/22 08 UT - 12/24 00 UT The radar wsas stopped because of the wrong setting of the T/R switch. ---- 2014 HKW RADAR OPERATION HISTORY 10/24 first light 10/24 During the installation two of the transmitters were found not working properly. It was replaced with spares. 10/24 2146:56 UT It was found that the main computer clock was ahead of time by 40 seconds. It was immediately adjusted. 10/28 0052 UT - 10/29 0550 UT The radar was stopped because the antenna had #15 had tilted element and it was fixed by the antenna manufacturer. 10/29 0550 UT The radar sea level height and main / interferometer array height difference information was corrected. ----