<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 19:20:00.000"
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="18.0">
<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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.02.05 (036) 19:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603602051920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.321" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.651" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.750" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.810" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="114.421" Name="h`E" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="542.174" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.643" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="470.875" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="290.235" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.578" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="257.742" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="89.770" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="142.337" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="239.040" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.980" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="139">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 271.667 273.333 275.000 275.000 277.188 279.375 281.563 283.750 285.938 288.125 290.313 292.500 294.688 296.875 299.063 301.250 303.438 305.625 307.813 310.000 310.000 315.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 330.000 330.000 330.000 330.000 335.000 340.000 340.000 343.000 346.000 349.000 352.000 355.000 355.000 355.000 360.000 362.500 365.000 370.000 371.667 373.333 375.000 376.667 378.333 380.000 381.667 383.333 385.000 386.667 388.333 390.000 390.000 395.000 397.500 400.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 480.000 480.000 480.000 480.000 480.000 482.826 485.652 488.478 491.304 494.130 496.957 499.783 502.609 505.435 508.261 511.087 513.913 516.739 519.565 522.391 525.217 528.043 530.870 533.696 536.522 539.348 542.174 545.000 551.412 558.385 565.996 574.338 583.519 593.675 604.969 617.604 631.832 647.977 666.453 687.804 712.759 742.314 777.869 821.459 876.154 946.817 1041.635 1175.549
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 0 0 63 66 0 0 0 0 57 0 0 0 0 51 0 0 0 0 0 54 60 51 66 66 72 0 63 66 0 63 69 72 72 75 72 75 0 0 0 48 66 72 69 54 0 60 48 0 0 0 0 0 0 0 0 0 0 0 66 66 66 0 63 57 66 60 66 63 51 63 54 63 66 66 69 66 66 66 60 63 60 60 63 60 57 63 63 66 66 60 66 63 69 48 66 63 66 66 63 0 63 63 60 63 60 63 63 57 63 60 57 60 60 51 51 0 0 0 0 0 0 0 0 0 45 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 -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 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 -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 -1.953125 2.734375 -1.171875 -2.734375 2.734375 -2.734375 -0.390625 1.953125 1.953125 -2.734375 1.953125 1.953125 -1.171875 2.734375 0.390625 -0.390625 1.953125 -2.734375 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.75 2.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
114.421 118.222
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625
</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" >
89.579 90.0 95.0 100.0 105.0 110.0 114.881 115.0 119.763 120.0 124.644 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 470.875 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.888 2.433 2.719 2.81 2.679 2.679 2.679 2.685 2.81 2.817 2.927 3.045 3.17 3.301 3.435 3.571 3.709 3.847 3.985 4.124 4.263 4.402 4.541 4.682 4.823 4.965 5.109 5.255 5.403 5.553 5.706 5.862 6.021 6.184 6.35 6.52 6.693 6.871 7.052 7.236 7.424 7.613 7.805 7.996 8.186 8.375 8.559 8.739 8.913 9.079 9.239 9.39 9.533 9.667 9.794 9.912 10.022 10.126 10.222 10.311 10.394 10.47 10.541 10.606 10.666 10.721 10.771 10.817 10.858 10.895 10.927 10.956 10.981 11.001 11.018 11.032 11.041 11.048 11.05 11.05 11.049 11.046 11.04 11.031 11.02 11.007 10.991 10.973 10.953 10.931 10.907 10.88 10.852 10.822 10.79 10.756 10.72 10.683 10.645 10.604 10.562 10.519 10.475 10.429 10.381 10.333 10.283 10.232 10.18 10.128 10.074 10.019 9.963 9.906 9.849 9.791 9.732 9.672 9.612 9.551 9.49 9.428 9.366 9.303 9.239 9.176 9.112 9.047 8.983 8.918 8.852 8.787 8.721 8.655 8.59 8.524 8.457 8.391 8.325 8.259 8.192 8.126 8.06 7.994 7.928 7.862 7.796 7.73 7.664 7.599 7.533 7.468 7.403 7.339 7.274 7.21 7.146 7.082 7.018 6.955 6.892 6.83 6.767 6.705 6.643 6.582 6.521 6.46 6.4 6.339 6.28 6.22 6.161 6.103 6.044 5.987 5.929 5.872 5.815 5.759 5.703 5.647 5.592 5.537 5.483 5.429

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.81" PeakHeight="110.0" Num="3" Error="0.0">
-30.028 12.459 -2.852
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.81" EndFrequency="11.05" PeakHeight="470.875" Num="5" zHalfNm="290.235" Error="9.92">
-370.192 41.121 -27.802 15.09 -4.448
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.644" Depth="0.131"/>
<TopsideChapman PeakHeight="470.875" PeakDensity="1514919.4" PeakScaleHeight="142.337" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
