精密控制測量網(wǎng)報告

1、海滄貨運通道n標段測量:控制網(wǎng)復測報告測量：計算：復核：審核：中鐵二十二局集團有限公司二O一五年月目錄1. 工程概況12. 技術(shù)依據(jù)及工作內(nèi)容12.1 技術(shù)依據(jù)12.2 工程范圍12.3 工作內(nèi)容13. .平面坐標及高程系統(tǒng)24. 平面控制網(wǎng)測量24.1 平面控制網(wǎng)復測、加密實施24.2 觀測數(shù)據(jù)后處理及其精度分析34.2.1 基線向量異步環(huán)閉合差34.2.2 重復基線較差44.3 加密網(wǎng)平差及精度分析45. 高程控制網(wǎng)測量錯誤!未定義書簽。5.1 高程控制測量主要技術(shù)要求錯誤!未定義書簽。5.2 高程控制測量主要限差要求錯誤!未定義書簽。5.3 高程控制測量觀測錯誤!未定義書簽。5.4 高程

2、控制測量內(nèi)業(yè)計算及精度評定.錯誤!未定義書簽。5.4.1 高程控制測量精度統(tǒng)計錯誤!未定義書簽。5.4.2 高程控制測量結(jié)論錯誤!未定義書簽。6. 提交的成果資料57. 復測加密結(jié)論78. 附件78.1 平面、高程測量控制網(wǎng)平差報告。78.2 GPS、高程聯(lián)測示意圖。錯誤!未定義書簽。1. 工程概況2. 技術(shù)依據(jù)及工作內(nèi)容2.1 技術(shù)依據(jù)(1) 工程測量規(guī)范(TB10101-2009)；(2) 國家三、四等水準測量規(guī)范(GB/T12898-2009)；(3) 鐵路工程衛(wèi)星定位測量規(guī)范(TB10054-2010)；2.2 工程范圍2.3 工作內(nèi)容1、平面控制網(wǎng)：(1)新埋設加密控制點7個(FL0

3、1、FL02、FL03、FL04、FL05、FL06，F(xiàn)L07)；(2)復測設計院交CPII控制點4個(FL8、FL1SFL14FL15),聯(lián)測新加密控制點7個，共計11個控制點。2、高程控制網(wǎng)：( 1)新埋設加密高程控制點4個；( 2)聯(lián)測設計院交高程控制點5個共計9個。3、本次平面控制網(wǎng)復測實施過程中，加密點按公路是三等GPS點精度施測；高程控制網(wǎng)包括聯(lián)測水準路線按國家三、四等水準測量規(guī)范三等水準測量的精度標準執(zhí)行。3 .平面坐標及高程系統(tǒng)3.1 平面坐標系統(tǒng)與原精密控制網(wǎng)相同，采用工程獨立坐標系統(tǒng)；采用北京54橢球參數(shù)，高斯投影，中央子午線經(jīng)度118.30度，投影大地高為-50米。3.2

4、 高程系統(tǒng)采用1985國家高程基準。4 .平面控制網(wǎng)測量4.1 平面控制網(wǎng)復測、加密實施本次加密網(wǎng)形成大地四邊形組成的帶狀網(wǎng)，采用邊聯(lián)式構(gòu)網(wǎng)，加密控制網(wǎng)聯(lián)測至相鄰cph上，形成大地四邊形。GPSffl密網(wǎng)觀測執(zhí)行的具體細則為：1、作業(yè)前按要求進行儀器檢校。對中設備采用精密對點器，對中精度小于1mm，在作業(yè)前及作業(yè)過程中對基座水準器、光學對點器進行檢校，確保其狀態(tài)正常；2、觀測嚴格執(zhí)行調(diào)度計劃，按規(guī)定時間進行同步觀測作業(yè)；3、使用5臺GPSg收機進行作業(yè)。采用同步靜態(tài)觀測模式，以控制點作為聯(lián)接邊，采用邊聯(lián)式構(gòu)網(wǎng)，形成大地四邊形組成的帶狀網(wǎng)；4、同步觀測時段時間大于45分鐘，多數(shù)為1.5h；5、作

5、業(yè)過程中，天線安置嚴格整平、對中；6、衛(wèi)星高度角設定15°數(shù)據(jù)采樣間隔設定為2秒；同步觀測有效衛(wèi)星總數(shù)5顆；7、每時段觀測前后分別量取天線高，誤差小于2mm取兩次平均值作為最終結(jié)果。8、作業(yè)中使用的對講機，離GP牖收機10m以外，一個時段觀測結(jié)束后，重新對中整平儀器，再進行第二時段的觀測。9、觀測過程中按照規(guī)定填寫了觀測手薄，對觀測點號、儀器高、儀器號、時間、日期以及觀測者姓名均進行了詳細記錄。4.2觀測數(shù)據(jù)后處理及其精度分析4.2.1 基線向量異步環(huán)閉合差基線向量異步環(huán)閉合差也是檢驗基線向量網(wǎng)質(zhì)量的一項重要技術(shù)指標。在解算出每一時段的同步基線向量后，以三角形作為構(gòu)環(huán)圖形，在不同時段

6、間組成異步基線環(huán)，并計算該異步環(huán)閉合差。基線向量異步環(huán)閉合差應符合下式規(guī)定：WxC3赤*oWyc3而*oWW3新*(TW3與*(T其中，GPS網(wǎng)相鄰點間弦長中誤差"用下式計算：22a(bd)a、b點取值見表4-1：表4-1GPS測量的精度指標表級別四等a(mim<5b(mm/kim<2上式中，n為閉合環(huán)邊數(shù)(n=3),g為GPS8線向量弦長中誤差(*；52(2d)2mm；d為實際環(huán)平均邊長，單位km加密網(wǎng)異步環(huán)閉合差最大為環(huán)JM1-JM2-JM3:閉合差52mm限差90.1mm;滿足限差要求，異步環(huán)閉合差檢驗合格。4.2.2重復基線較差對于基線邊，同一邊不同觀測時段基線較

7、差應滿足ds<2<2°其中苫(2d)2mmd為選定的重復基線長度，單位km.加密網(wǎng)重復基線較差最大為JM2-JM3較差為：2.2mm、限差28.3mm可知本次加密網(wǎng)復測所有重復基線向量較差均滿足規(guī)范限差要求。綜上所述，通過加密網(wǎng)的異步環(huán)基線閉合差檢驗以及重復基線較差檢驗的結(jié)果，可知此次復測的加密網(wǎng)基線解算正確，成果可靠。4.3加密網(wǎng)平差及精度分析本次加密網(wǎng)先進行三維無約束平差，而后進行二維約束平差，采用南方測繪GPS平差處理軟件。三維無約束基線網(wǎng)平差：從以上三維無約束平差精度統(tǒng)計可知，加密網(wǎng)基線向量網(wǎng)自身的內(nèi)符合精度較高，基線向量沒有明顯系統(tǒng)誤差和粗差，基線向量網(wǎng)的質(zhì)量是

8、可靠的，在此基礎上可以進行約束平差。二維約束平差加密網(wǎng)平差計算將加密網(wǎng)按投影帶分別進行，將各段聯(lián)測的CPII作為約束點對加密網(wǎng)進行約束平差，得到加密點各投影帶工程獨立坐標系成果。加密網(wǎng)二維約束平差精度如下：表4-2加密網(wǎng)二維約束平差精度統(tǒng)計表全網(wǎng)最弱邊最弱邊比例誤差最弱邊方向中誤差BCPII45-JM11:138400-1.5由以上統(tǒng)計可知，加密網(wǎng)平差精度滿足三等平面控制網(wǎng)最弱邊相對中誤差w1/100000,最弱邊相對方向中誤差w1.7的精度要求。6 .提交的成果資料本次平面復測、加密成果表詳見表6-1,高程復測、加密成果詳見表6-2。表6-1平面復測、加密成果表點名福廈線工程獨立坐標福廈線工

9、程獨立坐標（原坐標）坐標差值（mm備注X(m)Y(m)X(m)Y(m)AXAYFL012715095.0394444465.3371FL022715405.6111444387.0171FL032715643.7847444246.3402FL042715694.2780444088.4799FL052715888.1793444162.2317FL062716141.4561443820.5865FL072716425.4202443773.7495FL082714842.463444687.28102714842.463444687.28100FL132715831.4630444071.

10、96202715831.463444071.96200FL142715577.5670444229.95902715577.567444229.95900FL152715305.8230444398.96502715305.823444398.96500FL162716122.5617443907.7664FL172716392.0692443726.680216表6-2高程復測、加密成果表點名復測加密高程（口原測高程（nj）較差(mrm備注FL0121.562FL0320.66FL0612.586FL0710.393FL822.73622.2360FL1314.07414.0731FL141

11、6.64416.645-1FL1518.21518.2132FL1611.62611.62607 .復測加密結(jié)論本次復測平面控制網(wǎng)通過復測坐標與原坐標比較，坐標差值均小于15mm勺限差要求，成果真實有效；新加密控制點嚴格按照工程測量規(guī)范、工程衛(wèi)星定位測量規(guī)范的技術(shù)要求進行施測，各項精度指標均達標，滿足施工需求。本次三等水準復測加密各項精度指標均達到國家三、四等水準測量規(guī)范所規(guī)定的精度要求。復測的滿足規(guī)范限差要求。8 .附件8.1 平面、高程測量控制網(wǎng)平差報告。二維約束平差13基線條數(shù)：35平差點數(shù)：基線標準差置信度(松弛因子 ):Tau 檢驗顯著水平:單位權(quán)中誤差比 :x2 檢驗值 :x2 理

12、論范圍:x2 檢驗結(jié)果:平面四參數(shù):X 平移 (m):Y 平移 (m):旋轉(zhuǎn) :縮放 :10.00(T1.00%0.270114.044329.4812-82.0008False82.2746880424131-91.2699832423193000:00:01.383790.999992410095184高程擬合參數(shù):A:8.55836863172986B:0C:0D:0E:0F:0X0:0Y0:01.輸入的基線及標準差基線名TauDN(m)中誤差_DN(mm)DE(m)中誤差_DE(mm)10091672_1009.zsd-66191671_6619.zsd是310.57171.9-78.

13、32022.510091672_1009.zsd-93751682_9375.zsd是548.74552.4-218.99793.010091672_1009.zsd-96301682_9630.zsd是-252.57432.7221.94073.510091672_1009.zsd-84271672_8427.zsd是210.78192.3-66.36932.866191671_6619.zsd-93751682_9375.zsd是238.17352.5-140.67723.166191681_6619.zsd-93751683_9375.zsd是238.17305.6-140.67704.

14、766191681_6619.zsd-84271681_8427.zsd是482.57047.2-224.78505.966191671_6619.zsd-96301682_9630.zsd是-563.14592.9300.26143.866191681_6619.zsd-96301683_9630.zsd是171.95775.6-157.06124.366191671_6619.zsd-84271672_8427.zsd是-99.78972.511.95083.093751683_9375.zsd-96301683_9630.zsd是-66.21564.3-16.38383.31009168

15、1_1009.zsd-66191681_6619.zsd是-288.66666.2298.53825.210091681_1009.zsd-93751683_9375.zsd是-50.49462.8157.86232.410091681_1009.zsd-84271681_8427.zsd是193.90094.573.75213.710091682_1009.zsd-84271682_8427.zsd是193.90153.173.75063.510091682_1009.zsd-93751684_9375.zsd是447.17754.7-267.89415.510091682_1009.zsd

16、-96301684_9630.zsd是137.18513.4-16.51853.410091681_1009.zsd-96301683_9630.zsd是-116.70894.3141.47703.310091682_1009.zsd-66191682_6619.zsd是428.28354.2-180.71384.984271681_8427.zsd-93751683_9375.zsd是-244.39533.884.10973.384271682_8427.zsd-93751684_9375.zsd是253.27634.8-341.64505.484271682_8427.zsd-963016

17、84_9630.zsd是-56.71562.8-90.26983.284271681_8427.zsd-96301683_9630.zsd是-310.61155.667.72404.493751684_9375.zsd-96301684_9630.zsd是-309.99344.3251.37535.210091683_1009.zsd-93751685_9375.zsd是-283.96423.346.83702.910091683_1009.zsd-66191683_6619.zsd是-302.85854.3134.01694.210091683_1009.zsd-84271683_8427.

18、zsd是-33.35082.5-47.06932.284271672_8427.zsd-93751682_9375.zsd是337.96332.7-152.62772.484271672_8427.zsd-96301682_9630.zsd是-463.35613.3288.30974.066191682_6619.zsd-84271682_8427.zsd是-234.38294.1254.46504.866191682_6619.zsd-93751684_9375.zsd是18.89471.9-87.18033.166191683_6619.zsd-93751685_9375.zsd是18.8

19、9483.8-87.17943.566191682_6619.zsd-96301684_9630.zsd是-291.09894.0164.19534.766191683_6619.zsd-84271683_8427.zsd是269.50684.4-181.08634.484271683_8427.zsd-93751685_9375.zsd是-250.61353.393.90633.02.控制點坐標站點名N(m)中誤差_N(mm)E(m)中誤差_E(mm)U(m)中誤差_U(mm)FL082714842.46300.0444687.28100.022.73600.0FL132715831.463

20、00.0444071.96200.014.07300.0FL142715577.56700.0444229.95900.016.64500.0FL152715305.82300.0444398.96500.018.21300.03.平差后的基線及標準差基線名TauDN(m)中誤差_DN(mm)DE(m)中誤差_DE(mm)長度(m)相對誤差10091672_1009.zsd-66191671_6619.zsd是310.57180.7-78.32030.9320.29501:28472910091672_1009.zsd-93751682_9375.zsd是548.74580.8-218.998

21、90.9590.83211:50010910091672_1009.zsd-96301682_9630.zsd是-252.57220.7221.93750.8336.22751:31677610091672_1009.zsd-84271672_8427.zsd是210.78030.7-66.36650.8220.98161:20819766191671_6619.zsd-93751682_9375.zsd是238.17360.7-140.67750.8276.61671:25253266191681_6619.zsd-93751683_9375.zsd是238.17250.7-140.6772

22、0.8276.61571:25253166191681_6619.zsd-84271681_8427.zsd是482.57261.0-224.78471.0532.35751:37919866191671_6619.zsd-96301682_9630.zsd是-563.14360.7300.25890.7638.18981:64592966191681_6619.zsd-96301683_9630.zsd是171.95950.7-157.06420.7232.89321:23571766191671_6619.zsd-84271672_8427.zsd是-99.79130.711.95370.

23、7100.50471:10172393751683_9375.zsd-96301683_9630.zsd是-66.21360.7-16.38650.768.21111:7023710091681_1009.zsd-66191681_6619.zsd是-288.66640.9298.53910.9415.27571:31188510091681_1009.zsd-93751683_9375.zsd是-50.49580.9157.86420.8165.74361:13833610091681_1009.zsd-84271681_8427.zsd是193.90040.973.75250.8207.4

24、5311:17033610091682_1009.zsd-84271682_8427.zsd是193.90160.973.74940.8207.45321:17033610091682_1009.zsd-93751684_9375.zsd是447.17701.1-267.89471.3521.28191:30713910091682_1009.zsd-96301684_9630.zsd是137.18520.8-16.51910.8138.17611:12467010091681_1009.zsd-96301683_9630.zsd是-116.70690.8141.47490.8183.4002

25、1:16547310091682_1009.zsd-66191682_6619.zsd是428.28331.1-180.71421.2464.84861:28139184271681_8427.zsd-93751683_9375.zsd是-244.39600.984.11080.9258.46471:19898184271682_8427.zsd-93751684_9375.zsd是253.27581.1-341.64481.3425.28801:24886584271682_8427.zsd-96301684_9630.zsd是-56.71490.8-90.26980.8106.60781:

26、9061784271681_8427.zsd-96301683_9630.zsd是-310.61070.867.72070.8317.90741:27022393751684_9375.zsd-96301684_9630.zsd是-309.99371.1251.37511.3399.10591:23848210091683_1009.zsd-93751685_9375.zsd是-283.96441.146.83701.1287.80111:18565910091683_1009.zsd-66191683_6619.zsd是-302.85851.2134.01691.2331.18541:197

27、47810091683_1009.zsd-84271683_8427.zsd是-33.35071.1-47.06931.057.68701:3983284271672_8427.zsd-93751682_9375.zsd是337.96480.7-152.63060.7370.83191:38184584271672_8427.zsd-96301682_9630.zsd是-463.35210.0288.30330.0545.7234066191682_6619.zsd-84271682_8427.zsd是-234.38331.1254.46471.3345.95931:2079866619168

28、2_6619.zsd-93751684_9375.zsd是18.89490.7-87.18080.989.20481:7685866191683_6619.zsd-93751685_9375.zsd是18.89520.7-87.17890.989.20311:7685666191682_6619.zsd-96301684_9630.zsd164.19511.266191683_6619.zsd-84271683_8427.zsd-181.08631.284271683_8427.zsd-93751685_9375.zsd93.90631.14.基線改正數(shù)及標準差基線名Tau_VDN(mm)VD

29、E(m)dVDE(mm)10091672_1009.zsd-66191671_6619.zsd-0.00010.910091672_1009.zsd-93751682_9375.zsd-0.00101.310091672_1009.zsd-96301682_9630.zsd-0.00321.610091672_1009.zsd-84271672_8427.zsd0.00281.266191671_6619.zsd-93751682_9375.zsd-0.00031.466191681_6619.zsd-93751683_9375.zsd-0.00012.366191681_6619.zsd-8

30、4271681_8427.zsd0.00042.966191671_6619.zsd-96301682_9630.zsd-0.00251.866191681_6619.zsd-96301683_9630.zsd-0.00312.166191671_6619.zsd-84271672_8427.zsd0.00291.493751683_9375.zsd-96301683_9630.zsd-0.00261.610091681_1009.zsd-66191681_6619.zsd0.00092.510091681_1009.zsd-93751683_9375.zsd0.00191.010091681

31、_1009.zsd-84271681_8427.zsd0.00031.710091682_1009.zsd-84271682_8427.zsd-0.00121.610091682_1009.zsd-93751684_9375.zsd-0.00072.610091682_1009.zsd-96301684_9630.zsd是-291.09911.1334.21361:205222是269.50601.2324.69331:191957是-250.61381.1267.62981:170928VDN(m)中誤差中誤差_VDE(mm)dVDN(mm)是0.00000.70.1-0.4是0.00031

32、.00.2-0.3是0.00211.22.2-3.2是-0.00161.0-1.62.6是0.00001.00.00.2是-0.00052.80.00.2是0.00223.60.8-1.1是0.00231.42.4-2.9是0.00182.82.3-3.2是-0.00161.1-1.63.1是0.00212.12.2-3.3是0.00023.1-1.01.1是-0.00121.2-0.91.3是-0.00042.2-0.10.0是0.00021.3-0.10.0是-0.00062.20.1-0.1是0.00011.6-0.00061.60.2-0.310091681_1009.zsd-9630

33、16839630.zsd是0.00212.1-0.00211.51.3-2.110091682_1009.zsd-661916826619.zsd是-0.00021.9-0.00042.2-0.1-0.184271681_8427.zsd-937516839375.zsd是-0.00071.70.00121.4-0.91.384271682_8427.zsd-937516849375.zsd是-0.00052.20.00022.50.3-0.284271682_8427.zsd-963016849630.zsd是0.00071.2-0.00011.50.3-0.384271681_8427.z

34、sd-963016839630.zsd是0.00082.8-0.00332.11.3-2.093751684_9375.zsd-963016849630.zsd是-0.00032.0-0.00022.40.1-0.210091683_1009.zsd-937516859375.zsd是-0.00021.30.00001.10.00.010091683_1009.zsd-661916836619.zsd是0.00001.90.00001.9-0.10.010091683_1009.zsd-842716838427.zsd是0.00010.70.00000.60.00.084271672_8427

35、.zsd-937516829375.zsd是0.00161.2-0.00291.11.7-2.984271672_8427.zsd-963016829630.zsd是0.00391.7-0.00632.13.8-5.966191682_6619.zsd-842716828427.zsd是-0.00051.8-0.00032.2-0.10.266191682_6619.zsd-937516849375.zsd是0.00020.6-0.00041.30.20.066191683_6619.zsd-937516859375.zsd是0.00041.80.00051.60.20.066191682_6

36、619.zsd-963016849630.zsd是-0.00021.8-0.00022.10.2-0.266191683_6619.zsd-842716838427.zsd是-0.00082.0-0.00011.90.10.084271683_8427.zsd-937516859375.zsd是-0.00031.30.00001.20.10.05.平差后站點WGS84坐標(XYZ)站點名X(m)Y(m)Z(m)中誤差_X(mm)中誤差_Y(mm)中誤差_Z(mm)FL01-2721264.10555128168.57422632662.89310.00.00.0FL02-2721132.593

37、45128090.45532632944.29920.0FL030.0-2720961.69320.05128070.52252633160.88550.00.0FL04-2720810.92360.00.0FL05-2720839.44300.00.0FL06-2720483.82950.00.0FL07-2720385.20240.00.0FL08-2721510.52900.00.0FL13-2720767.78310.00.0FL14-2720958.64620.00.0FL15-2721162.32850.00.0FL16-2720564.10730.00.0FL17-2720351

38、.06830.00.06.平差后站點WGS84坐標(BLH)站點名Lat.中誤差_N(mm)中誤差_E(mm)0.00.00.00.00.00.00.00.00.00.00.0中誤差5128123.59085128021.64545128082.47535127998.93935128157.34065128078.69375128099.1646512812061645128034.7443Lon._U(mm)2633204.83682633383.29592633608.64562633865.79242632434.42242633328.22642633098

39、.92262632853.00042633591.37842633836.0609H(m)0.70.70.70.80.81.11.50.0FL01FL02FL03FL04FL05FL06FL07FL08FL130.80.70.70.80.81.31.60.0024:32:18.34916N9.2024:32:28.43252N9.2024:32:36.15486N9.2024:32:37.77537N9.2024:32:44.08668N9.2024:32:52.27356N9.2024:33:01.49615N9.2024:32:10.16911N4.1024:32:42.23168N117

40、:57:09.61063E117:57:06.78414E117:57:01.75226E117:56:56.13636E117:56:58.72921E117:56:46.55429E117:56:44.84951E117:57:17.53143E117:56:55.52997E30.120428.147029.225325.844630.218721.113518.784631.294422.63140.0FL140.025.9024:32:34.00068N117:57:01.17963E25.20340.00.03.9FL15024:32:25.19098N117:57:07.2227

41、5E26.77140.00.017.9FL16024:32:51.67088N117:56:49.65456E20.15111.11.29.2FL17024:33:00.40610N117:56:43.18184E20.65161.51.69.27.平差后站點目標坐標系坐標(NEU)站點名N(m)E(m)U(m)中誤差_N(mm)中誤差_E(mm)中誤差_U(mm)FL012715095.0394444465.337121.56210.70.89.2FL022715405.6111444387.017119.58860.70.79.2FL032715643.7847444246.340220.

42、66690.70.79.2FL042715694.2780444088.479917.28620.80.89.2FL052715888.1793444162.231721.66040.80.89.2FL062716141.4561443820.586512.55511.11.39.2FL072716425.4202443773.749510.22621.51.69.2FL082714842.4630444687.281022.73600.00.04.1FL132715831.4630444071.962014.07300.00.025.9FL142715577.5670444229.95901

43、6.64500.00.03.9FL152715305.8230444398.965018.21300.00.017.9FL162716122.5617443907.766411.59271.11.29.2FL172716392.0692443726.680212.09321.51.69.28.基線最弱邊和平面最弱點基線名中誤差_DN(mm)中誤差_DE(mm)中誤差(mm)相對誤差100916831009.zsd-842716838427.zsd1.070.971.451:39832(mm)站點名中誤差_N(mm)中誤差_E(mm)中誤差FL171.511.562.18四等水準測M記錄表（雙面

44、尺法）測站編號后尺上絲刖尺上絲方向及尺號標尺讀數(shù)K+黑-紅高差中數(shù)備注下絲下絲后視距前視距黑面紅面距離(Km)視距差d藝dFL161.6611.8124.7871.3616.050-2后1051.0611.2134.6871.5126.300-1前1066059.9后-前-0.151-0.250-1-0.1505119.90.10.1ZD11.7611.5124.6871.4526.2390后1061.1991.0144.7871.2655.9520前10556.249.8后-前0.1870.28700.18701066.46.5FL071.3670.7782.6392.0474.7874.6

45、871.0722.3415.7597.1290-1后105前10658.959.2后-前-1.269-1.3701-1.2695118.1-0.36.2FL172.7491.1084.6872.6397.4260后1062.5540.8124.7870.8985.5832前10519.529.6后-前1.7411.843-21.742049.1-10.1-3.9ZD11.6290.7222.3411.4394.7874.6871.1731.8915.8616.679-1-1后105前10690.70.590.2-3.4后-前-0.718-0.8180-0.7180180.9ZD22.7491.5794.6872.