<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 14:30:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="15.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.17 (290) 14:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202629010171430009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.506" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.188" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="511.415" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.399" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.365" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="371.868" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="247.517" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.630" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="164.105" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="61.052" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="90.430" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="196.980" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.500" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="108">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 332.500 335.000 335.000 337.673 340.346 343.019 345.692 348.365 351.038 353.711 356.384 359.057 361.730 364.402 367.075 369.748 372.421 375.094 377.767 380.440 383.113 385.786 388.459 391.132 393.805 396.478 399.151 401.824 404.497 407.170 409.843 412.516 415.189 417.862 420.535 423.207 425.880 428.553 431.226 433.899 436.572 439.245 441.918 444.591 447.264 449.937 452.610 455.283 457.956 460.629 463.302 465.975 468.648 471.321 473.994 476.667 479.339 482.012 484.685 487.358 490.031 492.704 495.377 498.050 500.723 503.396 506.069 508.742 511.415 520.000 525.000 535.000 545.000 550.000 565.000 575.000 590.000 605.000 620.000 640.000 660.000 684.445
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 66 66 63 60 63 0 66 63 63 63 63 66 66 63 60 63 63 66 66 63 0 0 66 66 0 66 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 2.734375 -2.734375 -1.953125 -0.390625 -2.734375 -2.734375 -2.734375 0.390625 -2.734375 0.390625 2.734375 1.171875 -1.171875 0.390625 -2.734375 -2.734375 2.734375 1.171875 2.734375 1.171875 1.953125 -1.171875 -0.390625 0.390625 2.734375 -1.171875 -1.953125 -2.734375 -0.390625 2.734375 -1.953125 -2.734375 0.390625 -1.171875 -1.171875 -2.734375 -1.171875 1.171875 -2.734375 -1.953125 1.953125 1.953125 -1.953125 1.953125 1.171875 0.390625 1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 1.171875 -1.171875 -2.734375 1.953125 -1.953125 -0.390625 1.171875 0.390625 2.734375 0.390625 1.171875 -2.734375 2.734375 -1.171875 1.171875 -2.734375 -0.390625 -1.171875 -0.390625 0.390625 1.953125 1.953125 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.482 90.0 95.0 100.0 105.0 110.0 111.514 113.028 114.542 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 371.868 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.287 2.941 3.288 3.399 3.276 3.276 3.399 3.417 3.598 3.766 3.929 4.089 4.247 4.406 4.567 4.728 4.891 5.057 5.224 5.394 5.565 5.738 5.913 6.089 6.266 6.444 6.622 6.801 6.979 7.158 7.336 7.514 7.691 7.867 8.042 8.216 8.389 8.561 8.731 8.9 9.068 9.234 9.398 9.56 9.719 9.876 10.03 10.18 10.326 10.467 10.602 10.729 10.847 10.954 11.048 11.127 11.188 11.229 11.248 11.25 11.249 11.241 11.228 11.208 11.182 11.151 11.114 11.072 11.025 10.974 10.918 10.858 10.794 10.726 10.655 10.58 10.502 10.422 10.338 10.252 10.164 10.073 9.981 9.886 9.79 9.692 9.593 9.493 9.392 9.289 9.186 9.082 8.977 8.872 8.767 8.661 8.555 8.449 8.342 8.236 8.13 8.024 7.919 7.813 7.709 7.604 7.5 7.397 7.294 7.192 7.09 6.989 6.889 6.79 6.691 6.594 6.497 6.401 6.306 6.212 6.118 6.026 5.935 5.845 5.755 5.667 5.58 5.494 5.408 5.324 5.241 5.159 5.078 4.998 4.918 4.84 4.763 4.688 4.613 4.539 4.466 4.394 4.323 4.253 4.184 4.116 4.049 3.983 3.918 3.854 3.791 3.729 3.668 3.607 3.548 3.489 3.432 3.375 3.319 3.264 3.21 3.157 3.104 3.052 3.002 2.951 2.902 2.854 2.806 2.759 2.713 2.667 2.623 2.579 2.535 2.493 2.451 2.409 2.369 2.329 2.29 2.251 2.213 2.176 2.139 2.103

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.399" PeakHeight="110.0" Num="3" Error="0.0">
-30.506 13.16 -3.172
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.399" EndFrequency="11.25" PeakHeight="371.868" Num="5" zHalfNm="247.517" Error="3.394">
-232.392 -37.82 15.62 -4.406 1.672
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.542" Depth="0.123"/>
<TopsideChapman PeakHeight="371.868" PeakDensity="1570254.4" PeakScaleHeight="90.43" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
