DYCOMS01 WCR Data Status Content: WCR configuration Calibration Notes Special note for interference in the first few range gates (added Feb 2003) Quick Looks (note on quick looks time labels, 9/21/01) Terminology General Notes Preliminary Calibration coefficients Flights Information C-130 WCR Configuration: Two 12" conical horn lens antennas pointing downward through 0.496" thick rexolite window. The approx.NADIR pointing antenna is connected to H-receiver (channel) and the BACKWARD pointing antenna is connected to V-receiver (channel). The cross-channels (HV and VH) have no meaning in this configuration. The transmitted pulses (250ns and 500ns) are linearly polarized with the same orientation. * Two antenna installations were used during the experiment with the 2nd one aimed to minimize(successfully) parasitic signal into the data due to antenna coupling (reflection is most likely the cause of the problem).: Configuration A (June 26 to July 14): H-antenna was installed horizontally and a reflector plate was used to redirect the beam, approx. vertically down. V-antenna was installed about 44 deg down-aft with respect to vertical. Configuration B (Jul 15 to August 3): H-antenna was left in the same position and V-antenna was rotated about 8 degrees so that the pointing angle down-aft was about 36 deg with respect to vertical. The precise antenna pointing angles are to be determined in the near future and recorded in the processed WCR data files. Preliminary values (Dave Leon 10/10/2001): Configuration A: H-antenna beam: 2.3 degrees back of nadir. Accuracy probably +- 0.1 degree. Beam init vector: [-0.0398,0,0.9993] V-antenna beam: 42.2 degrees back of nadir. Accuracy probably +- 0.5 degree. Beam init vector: [-0.6714,0,0.7410] Configuration B: H-antenna beam: same as for Configuration A V-antenna beam: 34.8 degrees back of nadir. Accuracy probably +- 0.5 degree. Beam init vector: [-0.571,0.0,0.821] ================================================================================ Calibration notes: Final Calibration constants for this experiment HHcal = 49.5; for 250 ns pulse, 5MHz IF filter - from Corner Reflector 46.0; for 500 ns pulse, 2MHz IF filter - from pulse width ratio Configuration A (June 26 - July 14): VVcal = 52.0; for 250 ns pulse, 5MHz IF filter - from drizzle data 48.5; for 500 ns pulse, 2MHz IF filter - from pulse width ratio Configuration B (July 16 - August 03): VVcal = 51.5; for 250 ns pulse, 5MHz IF filter - from drizzle data 48.0; for 500 ns pulse, 2MHz IF filter - from pulse width ratio HVcal/VHcal - cross channels have no meaning for this WCR configuration The H cal constant precision over a dynamic range > 70 dB is about +- 1dB. H-ch has a tendency to overestimate the reflectivity for values higher than -10 dBm (39 dBZ) of up to 1-2 dB. The V-ch cal constants are referenced to H-ch and drizzle measurements. The bias (accounting for internal calibration imbalance, antennas' gain difference, difference in waveguides losses) between H and V channels is not constant through out the whole dynamic range. There is a tendency for the difference to increase by as much as 1-1.5 dB at reflectivities below -25 dBZ. The averaged value assigned to V cal constant has about +- 1.5 dB precision w.r.t. H referenced value The absolute accuracy of the calibration constants is estimated to be around +-2 dB (based on the overall variability of the calibration constants from all calibration tests). The high end of the receivers completely saturate at +6 dBm (~ 55 dBZ) for the 5MHz Bessel IF filter. Cross-channel Isolation > 50 dB (not important since cross-channels have no meaning in this 2-antenna configuration) Antenna Coupling Separation (due to cross-talk between the antennas): ---------------------------------------------------------------------------- | Date | 6/26 | 7/7-7/13 | 7/17-7/20 | 7/24-8/3 | | | | | | | | H-ant to V-ant | > 25 dB | > 30 dB | > 55 dB | not noticeable | | | | | | | | V-ant to H-ant | > 25 dB | > 30 dB | not noticeable| not noticeable | ---------------------------------------------------------------------------- Strong signal in the first few range gates without the present of a target In the General Notes it is mentioned that the first few range gates up to 135 m are contaminated with above the noise interference. The nature of this interference for all WCR installation except for this one (first for NCAR C130) is associated with a leakage during the transmission and the time response of the IF filter. Normally this kind of leakage is insignificant at 90 m range gate and not noticeable (is below the mean noise) after 105 m. For DYCOMS this is not the case. First, the interference at the 0 range gate (most of the time at 75 m) has comparable or higher magnitude (approx. -35 dBm) than the leakage sample (receiver sample taken at the time of transmission). Second, the roll off of this interference is such that it is still significant at 105 m. The reason for this behavior is unknown. Preliminary Calibration coefficients (for the whole dynamic range): From the calibration performed on June 26, 2001 at Jeffco Airport: H-antenna (hhcal): 50.1 +- 0.6 dB, min=48.9, max=50.8 V-antenna (vvcal): 54.3 +- 0.6 dB, min=53.2, max=55.2 V-channel seems weak considering the similarity in the configuration which is estimated to be responsible for no more than 1-2 dB additional loss in V due to longer waveguide and possible difference in the two antennas gains. The problem could come from the unstable calibration setup for V antenna. Most likely we will have to calibrate V from weather targets and reference from H. ================================================================================ Quick looks: Reflectivity images for the near nadir pointing antenna are available on the project web site for each flight as pdf files. According to information received on Sep 25, 2001, the time stamps fed to the WCR TFP card in IRIG B format are UTC (not GPS). Since this was not known during the experiment and GPS time stamps were assumed, the quick looks have -13s time correction. Thus to match the quick looks to the actual UTC one has to add 13 second to the time axis labels. Terminology: 1) SPIKES are defined as short lasting (less than a few secs), large excursions in positive or negative direction (higher than 2-3 dB). 2) ELEVATED NOISE (including short spikes) is defined as occasional change in the mean noise that exceeds 2-3 dB and lasts from fraction of a second to more than a minute. It is usually associated with ground hits and/or multi-trip echoes. It is observed for side looking mode only. 3) NOISE JUMPS (usually less than 3 dB and lasting up to 10-20 sec). Probably some sort of short interference not necessarily in both channels and in some cases associated with the mirror position or change or A/C radio communications at freqs close to 120MHz 4) BAD DATA or other noise problem descriptions refer to unacceptable behavior of the data and/or noise channels. 5) DATA SHIFT means that all channels are shifted one range gate to the right for one or both of the DSPs. 6) DATA GAPS: gaps between profiles exceeding several times the average time interval between profiles 7) TIME STAMP ERROR: known fixed error in the time stamps. 8) TIME JUMPS: sync problem in the time which results in time stamps jumps of up to 2 sec. Noticed only in the beginning of the first file for less than 10 min. 9) DATA DISCONTINUITY: unexpected jumps in reflectivity occurring thru all range gates from one profile to another. General Notes: * The source of data discontinuities is not determined yet but is assumed to be caused by the data acquisition (DAQ); a possible cause is the increased hard disk I/O requests during acquisition time. This problem was observed only when 2 real-time displays, the DAQ, and a backup tape drive were competing for access to the same file on the hard disk. Discontinuities are identified at ths time for July 13 and 20. In both cases the conditions were as described above. * Most of the time if 0 range gate is at 60m it contains no good data. On the one hand often there is a significant leakage (less pronounced in the 1st range gate). This is generally the case when returned power is less than -45 dBm. On the other hand when there is a strong return at 0 range gate the power is again corrupted because the circulators are not fully open yet. During this experiment the leak at 75 m was still significant(-40 to -55 dBm) and even noticeable up to 135 m Tx leaks. * Leak samples at -30 to -40 dBm (lower than single antenna installation with OMT). * Typical Mean,STD noise levels(H-ch/V-ch) : 250 ns: ~ -65.0 to -65.6/-65.4 to -66.0 dBm, -76/-77 dBm 500 ns ~ -70.0 / -70.2 dBm, -81/-81 dBm * More frequent and larger data gaps than ever observed before. Few gaps larger than 4 seconds. * Average DSP jumps (data jumps between two consecutive profiles) are near zero but individual jumps are as high as 2-3 dB and thus averaging at least two profiles is highly recommended to reduce calibration errors. * In the quick looks, the angle for the aft pointing antenna is aprox. 44 deg from vertical for the first configuration (Jun 26 to Jul 13) instead of the plotted 42. The angles for both installations are from the installations drawings not from actual measurements. The true pointing angles for both antennas and antenna installations will be determined from the radar velocity data. * Printed times in the quick looks could be misleading. They are printed assuming equal spacing between the profiles. Since during this experiment we have experienced more and bigger data gaps than before the quick looks times are often shifted w.r.t. the actual time. * Raw Data location: /net/sova/sova2/dycoms01/julXX or sova3/dycoms01/julXX. Not all raw data may be available on disk because of a space limitation. A copy of the raw data is available on Exabyte tapes. -------------------------------------------------------------------------- Flight date/ File(size name) WCR mode Status ********************************************************************* jul07: (Test Flight, 3 hours, Sam) * The problem with antennas coupling persists even after absorber was installed all around both antennas. 6930432 Wpp01-07-07-18-52-31 - ppm4,short, multiple sea return 69722880 Wpp01-07-07-19-12-41 - ppm4,sea return, leak H->V 9990144 Wpp01-07-07-19-18-21 - ppm4,nothing 54113280 Wpp01-07-07-19-20-25 - ppm4,sea from H leaks to V, but no sea return in H ?????? 49170240 Wpp01-07-07-19-31-10 - ppm4,clouds in V, nothing in H ??? 18811024 Wpp01-07-07-19-36-00 - ppm6, clouds in V, nothing in H 182695392 Wpp01-07-07-19-38-53 - ppm6, -"- 172616160 Wpp01-07-07-19-47-36 - ppm4,V ant.disconnected at end of file 33369856 Wpp01-07-07-20-00-28 - ppm4,H ant.disconnected at end of file 185346656 Wpp01-07-07-20-05-00 - ppm4,H & V ants connected, leak H->V 322032224 Wpp01-07-07-20-20-49 - ppm4,low altitude, multi sea returns, sea return leak H->V and V->H 71374160 Wpp01-07-07-21-05-16 - ppm4,very low altitude, sea return ********************************************************************* jul09: (Ground tests: Antenna coupling) Short description of the ground tests: Using steering reflector plate H-antenna (down) was pointed toward a one-range gate target (radio tower at 9.04us/1356m). First file was recorded with that target. Second file was recorded with the same target but transmitting only thru V-antenna (pointing sideways). And the third file was recoded running again only V but with H-antenna plugged w/ mw absorber. During the recording of the first 3 files the C-130 rexolite window was removed. Then the next 3 files were taken the same way except that the rexolite window was re-installed. The test was expected to show the leak due to rexolite reflection or antennas' sidelobes into H-antenna while transmitting only V. No leak was noticed. The most likely reason is that the reflection leak was not exactly symmetrical and thus a narrow (spacial) target could be easily missed by the reflected beam or the sidelobes. TESTS ARE NOT CONCLUSIVE. See tests on July 11. C-130 Rexolite window removed: 686336 Wpp01-07-10-03-50-21 - SPP-H, H-antenna transmit only 1686272 Wpp01-07-10-03-51-16 - SPP-V, V-antenna transmit only 516096 Wpp01-07-10-03-55-24 - SPP-V, H antenna plugged with absorber C-130 Rexolite window installed: 550144 Wpp01-07-10-05-20-05 - SPP-H, H-antenna transmit only 602112 Wpp01-07-10-05-20-53 - SPP-V, V-antenna transmit only 637952 Wpp01-07-10-05-21-33 - SPP-V, H antenna plugged with absorber PDF files from processed data: 51970 test_rexolite_installed.pdf 45582 test_rexolite_removed.pdf ********************************************************************* jul10: (9 July,11:20pm-8am PDT,10 July, Vali,Leon) * See notes for the flight in jul10 directory * Antenna coupling not resolved. Total data: 4.3 GB 404813296 Wpp01-07-10-07-32-06 - ppm4 1017832640 Wpp01-07-10-08-10-10 - ppm4 627904832 Wpp01-07-10-09-42-44 - ppm4 10137568 Wpp01-07-10-10-33-12 - ppm4 849977408 Wpp01-07-10-10-34-33 - ppm4 518759040 Wpp01-07-10-11-45-32 - ppm4 551010208 Wpp01-07-10-13-26-59 - ppm4 168210784 Wpp01-07-10-14-13-58 - ppm4 305566592 Wpp01-07-10-14-28-50 - ppm4 22845582 WppScope01-07-11-06-40-26 - WCR Tx monitor data PDF files from processed data: 98053 Wpp01-07-10-07-32-06.leaktest.pdf ; antenna coupling samples 104264 Wpp01-07-10-08-10-10.leaktest.pdf ; antenna coupling samples ********************************************************************* jul11: (10 July,11:30pm-8am PDT,11 July, Leon) * See notes for the flight in jul11 directory * Antenna coupling not resolved. Total data: 6.6 GB 1371741000 Wpp01-07-11-06-51-55 - ppm4, rgs 37m ?, short interferences in the beginning (A/C radio at 118.6MHz) 12825888 Wpp01-07-11-08-01-57 - ppm4 334305600 Wpp01-07-11-08-05-46 - ppm4 1030632160 Wpp01-07-11-08-32-39 - ppm6 841425600 Wpp01-07-11-09-57-29 - ppm6 1335829376 Wpp01-07-11-11-06-51 - ppm6 423371376 Wpp01-07-11-12-54-25 - ppm6 548252512 Wpp01-07-11-14-11-39 - ppm4, huge noise corrupt. on V only (14:48) 123922880 Wpp01-07-11-14-53-07 - ppm4 245495648 Wpp01-07-11-15-03-32 - ppm4, short interferences (A/C radio) 22845582 WppScope01-07-11-06-40-26 - WCR Tx monitor data ********************************************************************* jul11: Ground tests: Antenna coupling (6pm-8pm PDT, Haimov, Vali) Short description of the ground tests: The tests from July 09 were repeated but this time a spatial distributed target was used (long building at 2.35us/351m) and the RF TURBO was OFF to avoid saturation of the receivers. Unfortunately this time we could not do the tests without the rexolite window and thus the problem, which was observed (see the pdf files), could not be uniquely attributed to the reflection or side lobes. Capture wide target while transmitting thru V but steering H antenna 971264 Wpp01-07-12-01-33-29 - SPP-V, wide target captured (leaked) 1648640 Wpp01-07-12-01-45-47 - SPP-V, H antenna plugged w/ mw absorber Tests for V antenna: 2858240 Wpp01-07-12-01-51-47 - SPP-H, wide target, H-transmitting only 3146752 Wpp01-07-12-01-54-52 - SPP-H, V antenna plugged w/ mw absorber 587776 Wpp01-07-12-02-02-12 - SPP-H, narrow target (radio tower) 603904 Wpp01-07-12-02-06-36 - SPP-V, for same target, no search (reflector plate fixed); did not see the leak Tests for H antenna: 1824256 Wpp01-07-12-02-21-21 - SPP-V, wide target, Gabor holds the long reflector plate and search (not steady) 1413888 Wpp01-07-12-02-33-44 - SPP-H, same, but H transmit only 559104 Wpp01-07-12-02-34-18 - SPP-H, same, but V antenna plugged w/ absorber PDF files from processed data: 19438 test_distr.target_rexolite.installed.pdf 25094 Htest_distr.target_rexolite.installed.pdf 15317 Vtest_distr.target_rexolite.installed.pdf ********************************************************************* jul13: (12 July,11:30pm-8am PDT,13 July, Vali,Leon) * Before 6:40, Leon reported loss of signal in H; similar to what Haimov experienced (and recorded) during July 7 test flight ???? * Antenna coupling not resolved. For next flight will change the angle of slanted antenna from 44 deg (from vertical) aft to 36 deg aft. * Two real-time displays were run simultaneously during this flight. The vxi DAQ apparently tolerated this but it cause discontinuities in the data not necessarily associated exactly with the time gap (to be determined). Total data: 3.9 GB 38774144 Wpp01-07-13-06-40-24 - ppm4, 500ns, sea return only 35980128 Wpp01-07-13-06-46-04 - ppm4, only sea return 43446720 Wpp01-07-13-06-54-54 - ppm4, only sea return 558979776 Wpp01-07-13-06-58-50 - ppm4, data gaps(<=0.6s),150rg, weak signal 472554624 Wpp01-07-13-07-43-21 - ppm4, data gaps(<=0.6s),150rg, weak signal 623212240 Wpp01-07-13-08-22-14 - ppm6, gaps(<=1.5s),100rg,discontinuities 330430848 Wpp01-07-13-09-29-36 - ppm6, data gaps(<=1.0s),100rg 532619664 Wpp01-07-13-10-04-57 - ppm6, gaps(<=1.5s),100rg, discontinuities 329872320 Wpp01-07-13-11-10-17 - ppm6, 4.3s data gaps(11:43) 76640832 Wpp01-07-13-11-45-11 - ppm6, gaps(<=1.5s),100rg,spike to 0 at end of file, likely vxi program crashed 227581104 Wpp01-07-13-11-54-12 - ppm4 241538848 Wpp01-07-13-14-06-24 - ppm4 512315744 Wpp01-07-13-14-40-12 - ppm4 ********************************************************************* jul17: (16 July,11:30pm-8:30am PDT,17 July, Haimov) * A new antenna installation. The down-aft antenna was rotated about 8 deg to break the symmetry between the two antennas, which caused antenna coupling in the received signals due to reflection. The new down-aft antenna angle is approximately 36 deg w.r.t. vertical. The new installation reduced the antenna coupling significantly (see short description and plots by clicking on July 19 antenna coupling test. Total data: 3.0 GB 89071616 Wpp01-07-17-06-30-09 - ppm4, short interferences in the beginning (A/C radio), up to 3.2s data gaps 116606176 Wpp01-07-17-06-46-53 - ppm4, few data gaps(<=0.7s),100rg 14863808 Wpp01-07-17-07-01-50 - ppm4, few data gaps(<=0.4s),150rg 6327880 Wpp01-07-17-07-04-36 - ppm4, 500ns, can barely see the cloud (not visible in the quick looks) 88448976 Wpp01-07-17-07-10-29 - ppm4, noise jumps (A/C radio), few data gaps(<=0.4s),80rg 30239264 Wpp01-07-17-07-27-03 - ppm4, few data gaps(<=0.6s),150rg 83996992 Wpp01-07-17-07-29-37 - ppm4, few data gaps(<=0.7s),150rg 129007840 Wpp01-07-17-07-45-12 - ppm4, few data gaps(<=0.4s),100rg 99185424 Wpp01-07-17-08-04-15 - ppm4, few data gaps(<=0.6s),140rg 24933472 Wpp01-07-17-08-14-37 - ppm4, few data gaps(<=0.3s),120rg 248197696 Wpp01-07-17-08-18-22 - ppm4, few data gaps(<=0.5s),100rg 10948608 Wpp01-07-17-08-47-52 - ppm4, no data gaps,50rg 86516736 Wpp01-07-17-08-50-55 - ppm4, no data gaps,50rg 19279872 Wpp01-07-17-09-28-02 - ppm4, no data gaps,50rg 97575024 Wpp01-07-17-09-36-49 - ppm4, few data gaps(<=0.9s),100rg 119012352 Wpp01-07-17-09-52-51 - ppm4, no data gaps,50rg 427088176 Wpp01-07-17-10-45-01 - ppm4, few data gaps(<=0.2s),100rg 217357952 Wpp01-07-17-11-34-52 - ppm4, few data gaps(<=0.1s, one 0.6s),100rg 321504976 Wpp01-07-17-12-02-18 - ppm6, few data gaps(<=0.4s),100rg 292496064 Wpp01-07-17-12-30-12 - ppm4, few data gaps(<=0.3s),100rg 22455808 Wpp01-07-17-13-05-35 - ppm4, no data gaps,30rg 109802368 Wpp01-07-17-13-31-25 - ppm4, few data gaps(<=0.6s),120rg 5467744 Wpp01-07-17-13-52-39 - ppm4, few data gaps(<=0.3s),120rg 13599440 Wpp01-07-17-13-53-57 - ppm4, few data gaps(<=0.3s),120rg 187392592 Wpp01-07-17-13-55-45 - ppm4, few data gaps(<=0.4s),120rg 91979760 Wpp01-07-17-14-12-22 - ppm4, few data gaps(<=0.4s),120rg 56237920 Wpp01-07-17-14-21-17 - ppm4, few data gaps(<=0.5s),150rg 104879168 Wpp01-07-17-14-25-24 - ppm4, few data gaps(<=0.3s),150rg 883026 WppScope01-07-17-06-28-41 - WCR Tx monitor data 3090744 WppScope01-07-17-07-14-31 15729714 WppScope01-07-17-08-27-22 ********************************************************************* jul18: (17 July,11:30pm-8:30am PDT,18 July, Haimov) * The first file during this flight was taken with H-antenna disconnected and H-port terminated but the antennas installation is not changed. This was a test to try to eliminate the path thru H-antenna. The signal received by V-antenna does not show H-antenna located sea return shadow. The second and third file were test file to verify that H-antenna was correctly re-connected and it receives signal at expected levels. Total data: 1.3 GB 57663040 Wpp01-07-18-06-27-28 - ppm4, test file, H-antenna disconnected H-port trminated, no evidence of reflection from H to V(see quicklooks); short interferences in the beginning (A/C radio at 118.6MHz) 18420480 Wpp01-07-18-06-55-31 - ppm4, test file, H-antenna connected a few double gaps (gap-nogap-gap) about 0.6s per gap are noticed 8585280 Wpp01-07-18-06-59-59 - ppm4, test file, check H- and V- channels 20687056 Wpp01-07-18-07-17-12 - ppm4, 500ns, can't see the cloud 196384304 Wpp01-07-18-07-26-08 - ppm4, only few gaps(<=0.4s), 89371840 Wpp01-07-18-08-00-02 - ppm4, only few gaps(<=0.5s), 100 rg 95884800 Wpp01-07-18-08-20-25 - ppm4, only few gaps(<=0.3s), 60 rg 100602768 Wpp01-07-18-08-44-28 - ppm4, no data gaps, 60 rg 11328208 Wpp01-07-18-09-14-28 - ppm4, no data gaps, 60 rg, sea return at 59 rg show 5MHz IF filter ringing (9:19) 34449584 Wpp01-07-18-10-20-49 - ppm4, only few gaps(<=0.4s) 259636352 Wpp01-07-18-10-29-51 - ppm4, only few gaps(<=0.9s) 60664256 Wpp01-07-18-11-01-25 - ppm4, no gaps,30 rg 67224576 Wpp01-07-18-12-08-11 - ppm4, no gaps,50 rg,huge interference(12:32) 42427392 Wpp01-07-18-12-44-30 - ppm4, no gaps, 50 rg 276149040 Wpp01-07-18-13-28-41 - ppm4, only few gaps(<=0.4s), 120 rg 15322464 WppScope01-07-18-07-29-42 - WCR Tx monitor data ********************************************************************* jul20: (19 July,11:15pm-8:15am PDT,20 July, Vali,Leon) * Two real-time displays were run simultaneously during this flight. The vxi DAQ apparently tolerated this but it seems that havier load on the disk access caused many more data gaps (DSPs not ready to process the next profile and thus creating a bigger time delay than the usual time interval between profiles for any given mode). * Many of the files have ocasional apparent discontinuities in the cloud images. They are not exactly related to the data gaps (for the few I checked) but there are many more and bigger gaps around these events. For examples, look at data around 7:26-7:27, 7:32:7:33. During 7:26-7:27 Total data: 3.7 GB 553459488 Wpp01-07-20-06-11-24 - ppm4, many data gaps(<=1s), noise level -67 early then to usual -65 146635488 Wpp01-07-20-07-25-58 - ppm6, huge number of gaps up to 2.7s, many discontinuities (see comments above) 669526376 Wpp01-07-20-07-37-06 - ppm6, data gaps(<=1.1s), discontinuities 185462784 Wpp01-07-20-08-53-11 - ppm6, data gaps(<=0.6s),60rg 144916480 Wpp01-07-20-09-18-14 - ppm6, data gaps(<=0.6s),96rg, 36242512 Wpp01-07-20-09-35-20 - ppm6, 217s only, data gaps(<=0.6s),100rg 12889568 Wpp01-07-20-09-42-22 - ppm4, 91s only, data gaps(<=0.2s),100rg 7140352 Wpp01-07-20-09-49-56 - ppm4, short,only 52 sec of data 15455104 Wpp01-07-20-09-51-03 - ppm4, spike to 0 at file end (last 2 profs) likely vxi program crashed 74906064 Wpp01-07-20-09-55-19 - ppm6, spike to 0 at file end (last 2 profs) likely vxi crashed; 1.9s data gap 9134080 Wpp01-07-20-10-05-22 - ppm6, short,only 44 sec of data 63659648 Wpp01-07-20-10-30-16 - ppm6, spike to 0 at file end (last 2 profs) likely vxi program crashed 1839140752 Wpp01-07-20-10-38-41 - ppm6, many discontinuities and data gaps (<= 1.1s) 9282402 WppScope01-07-20-06-17-16 - WCR Tx monitor data ********************************************************************* jul24: (23 July,11:30 pm-10:00am PDT,24 July, Leon) * Absorber was attached to the H-antenna mounting plate. Further reduction in antenna coupling reported. * Wpp01-07-24-14-16-01 has data problems in the last 8000 profiles. It seems like a DAQ problem of unknown origin. Total data: 4.1 GB 317473248 Wpp01-07-24-06-30-16 - ppm4, data gaps(<=0.6s),150rg 192078992 Wpp01-07-24-07-03-47 - ppm4, data gaps(<=0.4s),100rg 1285968 Wpp01-07-24-07-26-35 - ppm4, 10s only, data gaps(<=0.3s),100rg 23540848 Wpp01-07-24-07-26-58 - ppm4, 166s only, data gaps(<=0.4s),100rg 124300296 Wpp01-07-24-07-30-36 - ppm4, 659s,data gaps(<=1.8s),125rg 411575472 Wpp01-07-24-07-42-08 - ppm4, data gaps(<=0.6s),80rg fake problem with time interval/duration (openwcrf.pro rounding problem) discontinuities (8:05,8:07,8:08) 731962416 Wpp01-07-24-08-36-12 - ppm4, data gaps(<=0.4s),100rg 893140992 Wpp01-07-24-10-02-34 - ppm 399425920 Wpp01-07-24-11-03-24 - ppm 572337968 Wpp01-07-24-11-38-31 - ppm 186165888 Wpp01-07-24-12-45-11 - ppm 3665136 Wpp01-07-24-13-10-02 - ppm 34409920 Wpp01-07-24-14-10-10 - ppm 363588096 Wpp01-07-24-14-16-01 - ppm4, 13738752 Wpp01-07-24-14-50-49 - ppm 134099152 Wpp01-07-24-14-54-15 - 23363316 WppScope01-07-24-06-30-41 - WCR Tx monitor data ******************************************************************** jul25: (1:00 pm-10:15 pm PDT, Vali,Haimov) * No traces of antenna coupling noticed. * Some of the steady returns from sea at low altitude and weak clouds are useful to extract the 5 MHz IF filter impulse response to be used for removing the shadows due to the log detectors * The DAQ problem that happened on Jul24 has, most likely, occured for short times, in the beginning of files: Wpp01-07-26-00-42-30 and Wpp01-07-26-00-45-20. It corrected itself after few seconds, while the problem on July 24 persisted until the DAQ was stopped and a new file was started. Total data: 2.2 GB 53558512 Wpp01-07-25-20-06-39, ppm4, data gaps(<=0.6s),100 rg 9305056 Wpp01-07-25-20-25-55, ppm4, 43s only, data gaps(<=1.1s),150rg 14315936 Wpp01-07-25-20-33-06, ppm4, 106s,no clouds,data gaps(<=0.4s),100rg 3693488 Wpp01-07-25-20-45-22, ppm4, 27s only, data gaps(<=0.5s),100 rg 7404528 Wpp01-07-25-20-46-26, ppm4, 41s,only, data gaps(<=0.5s),120 rg 360052768 Wpp01-07-25-20-48-24, ppm4, data gaps(<=0.4s),150 rg 252346528 Wpp01-07-25-21-14-05, ppm4, data gaps(<=0.6s),150 rg 65855168 Wpp01-07-25-21-31-31, ppm4, data gaps(<=0.4s),150 rg 26843136 Wpp01-07-25-21-37-23, ppm4, 500 ns, no data gaps,50 rg 11238136 Wpp01-07-25-21-50-13, ppm4, data gaps(<=0.6s),120 rg 154040752 Wpp01-07-25-22-02-06, ppm4, data gaps(<=0.6s),120 rg 6816768 Wpp01-07-25-22-16-27, ppm4, no data gaps,50 rg 163216768 Wpp01-07-25-22-21-15, ppm6, practically no data gaps,50 rg 56391552 Wpp01-07-25-23-08-23, ppm6, no data gaps,50 rg 21624432 Wpp01-07-25-23-26-21, ppm6, no data gaps,20 rg 16623376 Wpp01-07-26-00-00-06, ppm6, no data gaps,20 rg 16064512 Wpp01-07-26-00-25-55, ppm6, no data gaps,50 rg 11787984 Wpp01-07-26-00-31-41, ppm6, 144s, data gaps(<=0.6s),60 rg 7727616 Wpp01-07-26-00-40-23, ppm6, 93s, no data gaps,60 rg 11585128 Wpp01-07-26-00-42-30, ppm6, 126s, data gaps(<=0.2s),65 rg first few secs rg shift (1st time I've seen it, DAQ problem ??) 117912000 Wpp01-07-26-00-45-20, ppm6, no data gaps,75 rg first few secs rg shift(DAQ problem ??) entraiments (9:52-54) 13629240 Wpp01-07-26-01-01-37, ppm6, 112s, data gaps(<=0.3s),75 rg 210034192 Wpp01-07-26-01-04-42, ppm6, data gaps(<=0.7s, beginning only),65 rg 28809568 Wpp01-07-26-02-07-07, ppm4, no data gaps,30 rg 196368768 Wpp01-07-26-02-42-22, ppm6, data gaps(<=0.3s, beg. only),50 rg 31645792 Wpp01-07-26-03-42-26, ppm4, 197s,no cloud, data gaps(<=1.0s),120 rg 183605696 Wpp01-07-26-03-47-35, ppm4, data gaps(<=0.2s),100 rg 48310272 Wpp01-07-26-04-15-07, ppm4, 500ns, no data gaps,50 rg, entraiments 770040 WppScope01-07-25-20-07-48 - WCR Tx monitor data 11140362 WppScope01-07-25-20-51-49 1237428 WppScope01-07-26-01-13-36 3912822 WppScope01-07-26-02-08-38 2245140 WppScope01-07-26-03-54-26 ********************************************************************* jul27: (12:00 am-9:00 pm PDT, Vali,Leon) Total data: 3.3 GB 417392256 Wpp01-07-27-18-54-01, ppm4, 500ns, 94rg, 17216704 Wpp01-07-27-20-03-08, ppm4, 100rg, 36822448 Wpp01-07-27-20-06-02, ppm4, 75rg, 657211856 Wpp01-07-27-20-14-21, ppm4, 100rg, 372727784 Wpp01-07-27-21-31-38 11704 Wpp01-07-27-22-48-08 406296 Wpp01-07-27-22-48-22 886231600 Wpp01-07-27-23-10-56 320775616 Wpp01-07-28-00-58-36 22147312 Wpp01-07-28-01-38-56 205255856 Wpp01-07-28-02-06-26 12226448 Wpp01-07-28-02-46-40 77455040 Wpp01-07-28-02-49-32 20589462 WppScope01-07-27-19-03-11 - WCR Tx monitor data ********************************************************************* jul30: (Ferry flight, Dan Diego-Denver, 10:30 am-3:00 pm PDT, Leon) Total data: 2.1 GB 264M Jul 30 14:06 Wpp01-07-30-17-31-49 ????? 22M Jul 30 13:26 Wpp01-07-30-19-24-01, ppm4, 100rg, data gaps(<0.2s) 27M Jul 30 13:30 Wpp01-07-30-19-27-21, ppm4, 100rg, data gaps(<0.2s) 15M Jul 30 13:33 Wpp01-07-30-19-31-20, ppm4, 100rg, data gaps(<0.3s) 54M Jul 30 13:40 Wpp01-07-30-19-33-33, ppm4, 100rg, data gaps(<0.4s) 86M Jul 30 13:53 Wpp01-07-30-19-42-44, ppm4, 500ns, pulse leaks at -8/-14 dBm 94rg, data gaps(<0.4s) A/C radio interference 12M Jul 30 13:55 Wpp01-07-30-19-54-28, ppm4, 500ns,97m rgd,169rg,datagaps<0.5s 16M Jul 30 13:57 Wpp01-07-30-19-55-53, ppm4, 55s only,500ns, data problems ???? 32M Jul 30 14:01 Wpp01-07-30-19-57-54, ppm4, 197s, 500ns,150rg, data problem ?? 5.6M Jul 30 16:03 Wpp01-07-30-20-02-45 ????? 82M Jul 30 14:44 Wpp01-07-30-20-38-38, ppm4, 500ns, 148rg, many data gaps<0.7s A/C radio interference 852M Jul 30 15:45 Wpp01-07-30-20-44-52, ppm4, 500ns, 148rg, many data gaps<0.6s A/C radio interference 583M Jul 30 16:27 Wpp01-07-30-21-46-29, ppm4, 210rg, clusters of data gaps<0.8s A/C radio interference 13M Jul 30 16:27 WppScope01-07-30-17-35-56 - WCR Tx monitor data *********************************************************************