FLWO Telescope Observing Statistics

Explanation of symbols post-2001:
  • A = assigned hours
  • L = total lost hours
  • W = lost hours due to weather
  • T = lost hours due to telescope
  • I = lost hours due to instrument
  • O = lost hours due to observer
  • hours as reported by observers
  •      1.5m Observing Statistics Jan-Dec 2007
            A       L      W       T      I      O  
           hrs      %      %       %      %      %
    -----------------------------------------------
    FAST  2030     33.6   95.9     2.2   2.3   1.4
    ECH   1167     17.1   94.6     0.5   1.1   0.7
    TRES   282     36.8   98.0     1.0   9.1   0.0 
    
         1.2m Observing Statistics Jan-Dec 2007
            A       L      W       T      I      O  
           hrs      %      %       %      %      %
    -----------------------------------------------
    KEP   3397     30.2   92.6     2.2   2.7   2.0
    
    
         1.5m Observing Statistics Jan-Dec 2006
            A       L      W       T      I      O  
           hrs      %      %       %      %      %
    -----------------------------------------------
    FAST  1550     35.0   90.2     3.4   2.7   1.0
    ECH   1331     28.3   92.4     5.2   3.6   0.1
    
         1.2m Observing Statistics Jan-Dec 2006
            A       L      W       T      I      O  
           hrs      %      %       %      %      %
    -----------------------------------------------
    KEP   3370     30.6   95.8     4.7    2.0  1.4 
    
    
         1.5m Observing Statistics Jan-Dec 2005
            A       L      W       T      I      O  
           hrs      %      %       %      %      %
    -----------------------------------------------
    FAST  2150     29.7   91.1    5.2    0.4   1.2
    ECH   1233     34.6   92.4    2.0    3.9   0.0
    
         1.2m Observing Statistics Jan-Dec 2005
            A       L      W       T      I      O  
           hrs      %      %       %      %      %
    -----------------------------------------------
    KEP   1238     24.1   95.6    2.3    0.8   1.8 
    MINI  1784     38.1   81.6    4.0    5.7   5.9 
    IRCAM  151     64.9   93.9    0.5    0.0   0.0
    
         1.5m Observing Statistics Jan-Dec 2004
            A       L      W       T      I      O  
           hrs      %      %       %      %      %
    -----------------------------------------------
    FAST  2168     35.7   96.0    0.5    1.4   0.5
    ECH   1331     31.4   96.1    2.3    1.9   1.3
    
         1.2m Observing Statistics Jan-Dec 2004
            A       L      W       T      I      O  
           hrs      %      %       %      %      %
    -----------------------------------------------
    4SH   1744      37.5  91.3    3.2    0.6   1.1
    MINI  1143      41.2  86.5    7.2    4.6   2.1
    IRCAM  365      49.9  91.2    1.6    3.3   3.8
    
    
         1.5m Observing Statistics Jan-Dec 2003
            A       L      W       T      I      O  
           hrs      %      %       %      %      %
    -----------------------------------------------
    FAST  2042     26.4   93.0    2.4    2.1    0.3 
    ECH   1123     36.9   93.9    0.3    4.5    0.2 
    AFOE   238     22.8   64.1    0.0   34.1    5.5 
    
         1.2m Observing Statistics Jan-Dec 2003
            A       L      W       T      I      O  
           hrs      %      %       %      %      %
    -----------------------------------------------
    4SH   2879     33.0   83.0    4.0    3.5    4.5 
    IRCAM  379     53.1   80.3    1.8   13.9    1.7 
    

         1.5m Observing Statistics Jan-Dec 2002
            A       L      W       T      I      O  
           hrs      %      %       %      %      %
    -----------------------------------------------
    FAST  2146     28.8   93.4    1.3    4.7    0.3 
    ECH    931     38.6   90.5    1.3    9.7    1.7 
    AFOE   375     42.8   64.9    1.9   33.2    0.0 
    
         1.2m Observing Statistics Jan-Dec 2002
            A       L      W       T      I      O  
           hrs      %      %       %      %      %
    -----------------------------------------------
    4SH   2093     35.1   92.5    0.4    3.7    3.9 
    IRCAM  754     40.2   85.1    2.7    9.9    3.1 
    

         1.5m Observing Statistics Jan-Dec 2001
              Obs      Wea     T     I    O   Wea/Obs+Wea T+I+O/Obs
    FAST      1445.0   646.5  15.0   6.0  0.0   31           1
    AFOE       252.3   170.5  15.0  12.0  0.5   40          11
    ECH        590.5   226.5   5.0   3.0  0.0   28           1
    Totals    2287.3  1043.5  35.0  21.0  0.5     
    
         1.2m Observing Statistics Jan-Dec 2001
              Obs      Wea     T     I    O   Wea/Obs+Wea T+I+O/Obs
    IRCAM      445.7   232.5  13.5  30.3  0.3   34          10
    4SHOOTER  1089.7   489.7  30.3  18.0  7.0   31           5
    Totals    1535.4   722.2  43.8  48.3  7.3      
    


    Click Here for a Plot of Weather Statistics for the 1.2 and 1.5m telescopes (1993-1999).


    1998 stats
     1.2m Telescope
    
      Month    Hours Hours Lost  Hours Lost   Hours Lost  Avg Length
               Obs   Weather     TL problems  Inst Prob.  Night
    
    
      Sept97   121      77          1             2
      Oct97    218      46          5             4
      Nov97    129      96          2             2
      Dec97    145     186          4             3
    
      Jan98    248     110          4             0
      Feb98     70     197          6            17
      Mar98    120     150         13             1
      Apr98    217      52          5             8
               ----     ---        ---            ---
    
              1268     914         40             37
    
                56%     40%         2%             2%
    
    2259 Total Hours Reported
    
    
      1.5m Telescope
    
      Month    Hours Hours Lost  Hours Lost   Hours Lost  Avg Length
               Obs   Weather     TL problems  Inst Prob.  Night
    
    
      Sept97   173     113          2             6
      Oct97    287      49          0             0
      Nov97    264      71          8             1
      Dec97    161     187          0             4
      Jan98    292      73          4             2
      Feb98    129     151          0             3
      Mar98    205     139          1             9
      Apr98    260      46          1             1
      May98    228      53          0             18
      June98   229      17          0             10
      July98   157     119          0             2
      Sept98   219      82          0             0
      Oct98    226      51          0             23
      Nov98    268      45          0             8   (start with elec logs)
      Dec98    254     113          0             1
    
    
    1997 stats
    
      1.2m Telescope
    
      Month    Hours Hours Lost  Hours Lost   Hours Lost  Avg Length
               Obs   Weather     TL problems  Inst Prob.  Night
    
      Sept96   148     134          5             1
      Oct96    168      64          7             0
      Nov96    152      93          0             0
      Dec96    259      41         12             1
    
      Jan97    190     150          3            12
      Feb97    172     123          5            13
      Mar97    264      41          6             2
      Apr97    214      59          1             0
      May97    172      85          2             4
      June97   178      18          2             4
      July97    93      63          0             0
               ----     ---        ---            ---
    
              2010     871          43            37
    
                68%     29%         1%             1%
    
    2961 Total Hours Reported
    
    
    1997 stats
    
      1.5m Telescope
    
      Month    Hours Hours Lost  Hours Lost   Hours Lost  Avg Length      
               Obs   Weather     TL problems  Inst Prob.  Night 
    
      Sept96   185     138          0             0
      Oct96    273      71          0             2
      Nov96    275      90          0             1
      Dec96    299      76          0             0
    
      Jan97    213     157          2             1
      Feb97    216     116          0             0
      Mar97    301      39          0             0  
      Apr97    216      57          0            22 (reticon failure)
      May97    192      85          1             0
      June97   232      21          0             1
      July97   144     121          1             1
               ----     ---        ---            ---         
    
              2546     971          4             28
                
                72%     27%         0%             1%
    
    3549 Total Hours Reported
    
    
    
    
    1996 stats
    
      1.2m Telescope
    
      Month    Hours Hours Lost  Hours Lost   Hours Lost  Avg Length      
               Obs   Weather     TL problems  Inst Prob.  Night 
    
    
      Sept     111     48           8.2           21      11    
      Oct      237.2   55           5.3          .75      11    
      Nov      256     13           1             0       12    
      Dec      188.5   104.5        9             0       13    
      Jan96    200.5   84           10            11      11    
      Feb      164     130          8             5.5     11    
      Mar      124.2    50.2         .7           7.3     10    
      Apr      160      16          8.3           1.7      9   
      May      104      17          1             0        8   
      June     113      50          3             0        8   
      July      67.5    95          3             0        8   
               ----     ---        ---            ---         
              1725.9   662.7       57.5           47.25       
                69%     27%         2%             2%
    
    2493 Total Hours Reported
    
    1.5m
    
     Month       Hours    Hours Lost   Hours Lost    Hours Lost      
                 Obs      Weather      TL Problems   Inst Problems   
    
     Sept        196        87            2.2            2.3         
     Oct         286        34            5.7            0            
     Nov         303        61            1.5             .5         
     Dec         276.3      95.5          1.3            0             
     Jan96       224.5      21             .5            3            
     Feb         128        121           0              0                        
     Mar         254.7      77.2          1              1
     Apr         273        37.5          1.5            4 
     May         244.2      12            1.2            3            
     June        189        58.7          0              1.5 
     July        110.5      159.5          .5            0
     Aug          14         26           0              0
                 -----      -----         -----          -----    
                2499.2      790.4         15.4           15.3     
                  75%        24%          <1%            <1%
    
    3320 Total Hours Reported
    
    
    1995   OBSERVING STATS
    
    60-INCH
                                          HOURS   HOURS    HOURS       AVG
                                HOURS    LOST TO  LOST TO  LOST TO   LENGTH
    Month                      OBSERVED  WEATHER   T.L.    INST.      NIGHT
    
    
    Sept                           175    128     0       0          11    
    Oct                            209    118    12       0          11
    Nov                            146    103     1       3          12
    Dec                            248    116     1       5          13
    Jan                            178    162     5       9          11
    Feb                            123     48     1       3          11
    Mar                            226     88     0       2          10
    Apr                            231     67     2       0           9
    May                            209     37     3       0           8
    Jun                            213      7     0       0           8
    Jul                            163     96     2       1           8
    
    TOTALS:                       2121    970    27      23
    
    3141 total hours
    TOTAL PERCENTAGES               67%    31%    <1%     <1%
    
    
    
    48-INCH
                                          HOURS   HOURS    HOURS       AVG
                                HOURS    LOST TO  LOST TO  LOST TO   LENGTH
    Month                      OBSERVED  WEATHER   T.L.    INST.      NIGHT
    
    Sept(1994)                     127    113     5       0          11    
    Oct                            192     94    17       1          11
    Nov                            166    166     8       1          12
    Dec                            236    132     8       0          13
    Jan(1995)                      167    157    12       3          11
    Feb                            154    127     2       0          11
    Mar                            172     59     4       0          10
    Apr                            183     20     2       0           9
    May                            162     51     4       4           8
    Jun                            199     13    19       3           8
    Jul                            142     53     6       0           8
    
    TOTALS:                       1900    985    87      12  
    
    2984 total hours
    TOTAL PERCENTAGES               64%    33%    3%     <1%
    
    
    
    1994 OBSERVING STATS, FIRST TWO TRIMESTERS 
    
    60-INCH
                                          HOURS   HOURS    HOURS     AVG     AVG
    1994-1                      HOURS    LOST TO  LOST TO  LOST TO  LOST TO  LENGTH
    Month                      OBSERVED  WEATHER   T.L.    INST.    ENG.     NIGHT
    
    
    Jan     8 nights  Echelle       50      44      0       0        7      12.6
            7 nights  FAST engin     0       0      0       0       86      12.0
            10 nights FAST          79      29      0       6        4      11.8
            5 nights AFOE           24      35      0       0        0      11.8
    
    Feb     11 nights Echelle       81      46      2       0        3      12.0
            16 nights FAST          88      80      0       7        0      10.9
            1 nights AFOE            4       6      0       0        0      10.0
    
    
    Mar     4 nights Echelle        16      23      2       0        5      11.5
            20 nights FAST          111     92      1       11       0      10.8
             7 nights AFOE          54      18      1       2        0      10.7
    
    
    Apr     11 nights Echelle       53      47      5       0        0      9.5
            19 nights FAST          127     47      2       4        0      9.5
    
    
    
    TOTALS: 119 nights             687     467     13       30     105      10.9
    
    1297 total hours
    TOTAL PERCENTAGES               53%     36%     1%      2%      8%
    
    
    
    
    1994-2
    
    May     6 nights Echelle        41      14      0       0        0      9.2
            19 nights FAST          114     38      0       6        0      8.3
            6 nights AFOE           32      15      0       0        0      7.8
    
    
    Jun     12 nights Echelle       25      60      3       0        8      8.0
            18 nights FAST          120     18      6       0        0      8.0
    
    
    Jul     14 nights Echelle       44      70      0       5        0      8.5
            17 nights FAST          99      32      1       4        0      8.0
    
    
    
    TOTALS: 92 nights              478      247     10      15       8
    
    758 total hours
    TOTAL PERCENTAGES               63%     33%     1%      2%      1%
    
    
    48-INCH
    
                                          HOURS   HOURS    HOURS     AVG     AVG
    1994-1                      HOURS    LOST TO  LOST TO  LOST TO  LOST TO  LENGTH
    Month                      OBSERVED  WEATHER   T.L.    INST.    ENG.     NIGHT
    
    
    Jan     24 nights  CCD          222     32      6       11       0      11.3
            5 nights SONIC          8       42      0       7        0      11.4
            2 nights SSPM           11      0       4       11       0      13.0
    
    
    Feb     23 nights CCD           118     133     1       12       0      11.5
            5 nights SONIC          37      17      0       2        0      11.2
    
    
    Mar     24 nights CCD           127     86      1       0        14     9.5
            7 nights SSPM           45      28      0       0        0      10.4
    
    
    Apr     20 nights CCD           118     60      2       2        0      9.1
            4  nights SONIC         15      5       2       16       0      9.5
            6 nights engin                                          60      10.0
    
    
    TOTALS: 120 nights             701     403     16       61     74       10.5
    
    1255 total hours
    TOTAL PERCENTAGES               56%     32%     1%      5%      6%
    
    
    
    
    1994-2
    
    May     31 nights CCD           172     61      2       0        19     8.2
    
    
    Jun     22 nights CCD           115     54      5       2        0      8.0
            8 nights SSPM           18      33      6       7        0      8.0
    
    
    Jul     24 nights CCD           108     79      3       0        0      7.9
            7 nights SONIC          8       27      0       24       0      8.4
    
    
    
    TOTALS: 92 nights              421      254     16      33       19     8.1
    
    743 total hours
    TOTAL PERCENTAGES               57%     34%     2%      4%      3%
    
    
    
    
    1993 Observing Stats
    
                                          HOURS   HOURS    HOURS     AVG
                                HOURS    LOST TO  LOST TO  LOST TO  LENGTH
    Month                      OBSERVED  WEATHER   T.L.    INST.    OF NIGHT
    
    60"
    
    Sept    7 nights  Echelle       48      32      5       0       12.1
            5 nights  Zmach         47      0       3       0       10.0
                                    70%     24%     6%      0%
    
    Oct     10 nights Echelle       61      58      2       0       12.1
            14 nights Zmach         79      68      2       0       10.6
            7 nights AFOE           45      23      4       0       10.3
                                    54%     44%     2%      0%
    
    Nov     13 nights Echelle       106     50      9       3       12.9
            17 nights Zmach         86      101     4       0       11.2
                                    53%     42%     4%      1%
    
    Dec     10 nights Echelle       86      38      8       0       13.2
            14 nights Zmach         89      68      4       0       11.5
            7 nights AFOE           38      44      2       0       12.0
                                    56%     40%     4%      0%
    
    
    TOTALS: 104 nights             685     482     43       3       11.7
    
    
    TOTAL PERCENTAGES              56%     40%     4%      <1%
    
    
    
    48"
    
    Sept    17 nights CCD           103     52      0       0       9.1
                                    66%     34%     0%      0%
    
    Oct     26 nights CCD           125     138     6       1       10.4
            5 nights SONIC          31      11      0       18      12.0
                                    47%     45%     2%      6%
    
    Nov     23 nights CCD           172     101     0       1       11.9
            6 nights SONIC          28      42      0       1       11.8
                                    58%     41%     0%      1%
    Dec     17 nights CCD           85.5    71      11.5    2       10.0
            9 nights SONIC          45      32      1       11      9.8
            5 nights SSPM           33.5    15      1.5     6       11.2
                                    52%     37%     4%      6%
    
    
    TOTALS: 109 nights              623     462     20      40      10.5
    
    TOTAL PERCENTAGES               54%     40%     2%      4%
    
    
    
    
    Latest update 04/05/04 by EF