VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: C041A Observer: Krichbaum, T. Project type: VLBI Obs filename: c041acrd.* Date/Day: 2004APR16/107 Ants Scheduled: HN NL FD LA PT KP OV MK =UT-Time===Comment===============================================MF#===%AD==AMD= Operator is Cyrus M Reed. VCLOCK and GPS DELTA OK. UT1-UTC OK (-0.45). WEA: Cloud cover via webcam: WEA: HN Clear skies. WEA: NL Altocumulus (90%). WEA: FD,LA,PT,KP Cirrus (80%,75%,40%,50%). WEA: OV,BR Stratus (100%,100%). WEA: MK Altostratus (90%). WEA: No recent precipitation at any site. 2357 Begin observing. All antennas on source. 2357-1952 %MK 3mm running a little warm,needs coldhead 13791 25 1018 replacement. 0000 Date is 2004APR17/108. 0000-0100 All readbacks OK. 0046-0047 *KP EL2 armature over current. Dis/enabled axis to ACU 100 1 clear. 0100-0200 All readbacks OK. 0140 %MK WEA: Wind gusts 35+ MPH. 0200-0300 All readbacks OK. 0300-0400 All readbacks OK. 0400-0500 All readbacks OK. 0500-0548 All readbacks OK. 0547 New operator is Jim Ogle. 0554 *Raining at NL. 0608 Readbacks okay. 0708 All readbacks this past hour okay. 0808 All readbacks this past hour okay. 0828-0830 *FD FRM reset itself, may have been out of position. FRM 100 2 Restarted the scan to load position commands again. 0848-0851 *MK rotation drive fault. Resent position command. FRM 100 3 0909 Readbacks this past hour okay. 0928-0936 *MK rotation drive fault again. FRM 100 8 0928 %High wind gusts at KP. 0948-0949 *MK rotation drive fault again. FRM 100 1 1009 Readbacks this past hour okay. 1053-1056 *MK rotation drive fault again. FRM 100 3 1108 Readbacks this past hour okay. 1123 Readbacks okay. 1138 *HN bad readbacks, all tracks except track 29 on drive #1. Other sites all okay. 1153 *HN bad readbacks on most tracks. Other sites okay. 1209 Readbacks okay. 1309 Readbacks this past hour okay. 1330 *KP WEA: Wind gusts > 35 mph. 1335 New Operator is Dave Pierce. 1335 WebCam Weather Update: HN,LA,KP - Overcast/high clouds. NL,PT - Clear. FD,OV - Partly cloudy. MK - Still dark. 1408 Readbacks this past hour okay. 1508 Readbacks this past hour okay. 1525 *KP WEA: Wind gusts > 40 mph. 1608 Readbacks this past hour okay. 1708 Readbacks this past hour okay. 1721 *KP WEA: Wind gusts > 35 mph. 1740 *MK WEA: Wind gusts > 35 mph. 1800 WebCam Weather Update: HN,FD,LA,MK - Overcast/high clouds. NL,PT,KP,OV - Partly cloudy. 20mph plus winds at LA,PT,KP,MK. 1808 Readbacks this past hour okay. 1908 Readbacks this past hour okay. 2008 Readbacks this past hour okay. 2026 *PT WEA: Wind gusts > 35 mph. 2027 *MK WEA: Wind gusts > 35 mph. 2027 *KP WEA: Wind gusts > 35 mph. 2108 Readbacks this past hour okay. 2112 *LA WEA: Wind gusts > 35 mph. 2206-0012 *LA WEA: Autostowed. 55mph plus wind gusts. WEA 100 126 2206 *LA WEA: Precipitation starting. 2208 Readbacks this past hour okay. 2228 All readbacks are okay. 2248 OV Bad readback on Drive #2, track 25. All other site readbacks are okay. 2308 All readbacks are okay. 2330 *OV WEA: Wind gusts > 35 mph. 0000 Date is 2004APR18/109. 0008 Readbacks this past hour okay. 0023 *OV Bad readbacks on Drive #2, tracks 31 & 33. All other site readbacks are okay. 0038 Readbacks okay. 0053 Readbacks okay. 0136 HN WEA: Overcast. 0146 New operator is Jim Ogle. 0239 Readbacks this past hour okay. 0248 *NL bad readbacks on track 2, drive #1. Other sites 13843 okay. 0303 %Raining at MK. 0308 Readbacks okay. 0328 *NL bad readbacks on track 8. Other sites okay. 13843 0349 Readbacks okay. 0409 *NL bad readbacks on track 2. Other sites okay. 13843 0428 Readbacks okay. 0448 *NL bad readbacks on track 2. Others okay. 13843 0509 Readbacks okay. 0528 *NL bad readbacks on track 8. Other sites okay. 13843 0549 Readbacks okay. 0609 *NL bad readbacks on track 2. Other sites okay. 13843 0708 Readbacks this past hour okay. 0729 *NL bad readbacks on tracks 2 and 4. Other sites 13843 okay. 0749 *NL bad readbacks on track 2. Other sites okay. 13843 0809 *NL bad readbacks on track 2. Other sites okay. 13843 0929 Readbacks this past hour okay. 0948 Readbacks okay. 1009 *NL bad readbacks on track 2. Other sites okay. 13843 1050-1051 *FD autostowed, commercial power glitch. Repointed. COM 100 1 1108 Readbacks this past hour okay. 1123 Readbacks okay. 1138 *NL bad readbacks on track 2. Other sites okay. 13843 1153 *NL bad readbacks on track 2. Other sites okay. 13843 1252-1253 *FD FRM reset itself, may have become out of FRM 100 1 position. Restarted scan to reload position commands. 1253 Readbacks this past hour okay. 1309 Readbacks okay. 1324 *NL bad readbacks on track 2. Other sites okay. 13843 1335 New Operator is Dave Pierce. 1406-1407 *PT Lost vacuum on drive #2. Reloaded. REC 100 1 1423 Readbacks this past hour okay. 1445 Webcam Weather Update: HN,LA,PT,KP,OV - Clear. NL - Overcast. FD - Scattered high thin clouds. MK -Dark. 1523 Readbacks this past hour okay. 1553 Readbacks are okay. 1608 Readbacks are okay. 1614 *LA WEA: Wind gusts > 35 mph. 1628 *LA Bad readback on drive #2, track 32. All other 13844 site readbacks are okay. 1728 Readbacks this past hour okay. 1742 *MK WEA: Wind gusts > 35 mph. 1828 Readbacks this past hour okay. 1849-1852 *KP Autostowed. Power bump. Repointed. COM 100 3 1904 *NL WEA: Wind gusts > 35 mph. 1928 Readbacks this past hour okay. 1948 Readbacks are okay. 2008 Readbacks are okay. 2025 Webcam Weather Update: HN - Overcast, high thin clouds. NL - Overcast. FD - Partly cloudy. LA,PT,KP - Clear. OV - Mostly clear, scattered thin clouds. MK - High thin clouds. 2028 *LA Bad readback on drive #2, track 32. All other 13844 site readbacks are okay. 2032 *FD WEA: Wind gusts > 35 mph. 2040 *MK WEA: Wind gusts > 35 mph. 2128 Readbacks this past hour okay. 2153 *MK WEA: Wind gusts > 35 mph. 2208 Readbacks are okay. 2219 *FD WEA: Wind gusts > 35 mph. 2228 *LA Bad readback on drive #2, track 32. All other 13844 site readbacks are okay. 2249 *NL WEA: Precipitation starting. 0000 Date is 2004APR19/110. 0008 Readbacks this past hour okay. 0028 *LA Bad readback on drive #2, track 32. All other 13844 readbacks are okay. 0048 Readbacks are okay. 0108 Readbacks are okay. 0128 *FD Bad readbacks on Drive #2, tracks 2 and 4. All other site readbacks are okay. 0140 New operator is Jim Ogle. 0148 Readbacks okay. 0157 LA reports clear skies. 0205 HN reports clear skies. 0208 *LA bad readbacks on track 8. Other sites okay. 0308 Readbacks this past hour okay at all sites. 0322 MK reports scattered cirrus clouds. 0328 Readbacks okay. 0348 Readbacks okay. 0409 *KP bad readbacks on track 31, drive #1. Other sites okay. 0448-0456 *KP EL#2 armature over current fault, antenna may ACU 100 8 not have been tracking in EL properly. Disabled the EL axis briefly to clear error then repointed. 0509 Readbacks this past hour okay at all sites. 0609 Readbacks this past hour okay at all sites. 0638 %High wind gusts at NL. 0709 Readbacks this past hour okay at all sites. 0809 Readbacks this past hour okay at all sites. 0824 Readbacks okay. 0839 Readbacks okay. 0854 *NL bad readbacks on tracks 31 and 33, drive #1. Other sites okay. 0954 Readbacks this past hour okay at all sites. 1054 Readbacks this past hour okay at all sites. 1209 Readbacks this past hour okay at all sites. 1214 HN reports scattered low clouds. 1309 Readbacks this past hour okay at all sites. 1313 %FD reports overcats skies, drizzle, damp conditions. 1335 New Operator is Dave Pierce. 1358 LA WEA: Scattered high clouds, dish is dry. 1425 Webcam Weather Update: HN,NL,LA,PT - Partly cloudy. FD - Overcast. KP,OV - Clear. MK - Still dark. 1408 Readbacks this past hour okay. 1508 Readbacks this past hour okay. 1608 Readbacks this past hour okay. 1708 Readbacks this past hour okay. 1809 Readbacks this past hour okay. 1851 *PT WEA: Wind gusts > 35mph. 1854 *FD WEA: Wind gusts > 35 mph. 1921 *PT WEA: Wind gusts > 50 mph. 1921 MK WEA: Scattered cirrus. 1922 HN File ends. 1923 Readbacks this past hour okay. 1938 *FD WEA: Wind gusts > 35 mph. 1938 Readbacks are okay. 1952 End. Downtime Summary: Total downtime : 1176 min Percentage downtime of observing: 3.6% Average downtime per hour : 2.2 min Total scheduled observing time (# Antennas): 32600 min (8) Notes: * = Entries where data was affected. % = Entries where data may have been affected. & = Entries where the site tech was called out. WEA = Weather entries. MF# = Maintenance form or major downtime category associated with a problem. %AD = The percentage of an antenna affected by a problem. AMD = Total antenna-minutes downtime for a problem. Tsys = System Temperature (TP/SP x Tcal/2) ACU = Antenna Control Unit FRM = Focus/Rotation Mount RFI = Radio Frequency Interference VME = Site control computer CB = Circuit Breaker vclock = Program that compares site clock time to a standard.