<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 21:40:00.000"
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="2 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2x cusp not found, 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" >
2026.02.04 (035) 21:40:00</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">
FF202603502042140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.247" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.784" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="636.466" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.652" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="476.678" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="383.169" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.031" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="136.887" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="31.243" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.971" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="143.000" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.690" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="141">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 351.250 352.500 353.750 355.000 356.250 357.500 358.750 360.000 360.000 365.000 366.000 367.000 368.000 369.000 370.000 370.000 370.000 371.000 372.000 373.000 374.000 375.000 376.000 377.000 378.000 379.000 380.000 385.000 388.000 391.000 394.000 397.000 400.000 395.000 400.000 402.500 405.000 407.143 409.286 411.429 413.571 415.714 417.857 420.000 415.000 420.000 420.000 423.000 426.000 429.000 432.000 435.000 436.667 438.333 440.000 440.000 440.000 445.000 447.500 450.000 452.500 455.000 457.500 460.000 462.500 465.000 467.500 470.000 472.500 475.000 477.500 480.000 482.500 485.000 485.000 488.333 491.667 495.000 500.000 500.000 500.000 502.500 505.000 507.500 510.000 515.000 518.000 521.000 524.000 527.000 530.000 535.000 535.000 540.000 545.000 550.000 550.000 555.000 555.000 560.000 565.000 565.000 570.000 575.000 580.000 580.000 585.000 588.750 592.500 596.250 600.000 600.000 605.000 610.000 615.000 615.000 615.000 625.000 630.000 630.000 636.466 644.194 653.594 665.274 680.176 699.850
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 66 66 0 0 57 54 0 0 0 0 0 0 60 69 0 0 0 0 0 0 0 60 63 54 0 0 0 0 54 63 63 0 57 0 0 0 0 0 60 0 0 0 0 0 0 0 48 0 60 0 60 0 0 0 0 0 0 51 63 63 66 0 66 0 0 54 0 0 60 63 63 69 0 0 0 69 0 66 0 0 0 0 0 0 0 0 0 63 66 0 0 60 45 60 63 0 60 0 60 60 0 0 0 0 60 54 63 60 54 48 60 57 60 63 60 63 69 66 57 66 60 0 48 0 57 63 63 60 54 0 60 57 54 54 54 54 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 0.390625 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 2.734375 -1.171875 -0.390625 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.171875 -2.734375 -1.953125 1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 1.953125 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.911 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.75 140.0 145.0 150.0 155.0 160.0 161.5 165.0 170.0 175.0 180.0 185.0 187.25 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 476.678 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.432 0.565 0.631 0.652 0.643 0.614 0.562 0.482 0.349 0.32 0.32 0.32 0.32 0.32 0.32 0.32 0.365 0.43 0.494 0.559 0.623 0.652 0.704 0.781 0.85 0.918 0.986 1.058 1.133 1.213 1.298 1.39 1.49 1.599 1.718 1.847 1.987 2.137 2.299 2.469 2.648 2.833 3.022 3.214 3.408 3.603 3.797 3.991 4.184 4.375 4.566 4.756 4.944 5.132 5.319 5.504 5.69 5.874 6.058 6.242 6.425 6.608 6.79 6.972 7.153 7.334 7.514 7.692 7.869 8.043 8.215 8.382 8.543 8.695 8.838 8.965 9.075 9.161 9.22 9.248 9.25 9.248 9.237 9.217 9.188 9.151 9.107 9.056 8.997 8.933 8.863 8.787 8.706 8.621 8.531 8.438 8.341 8.241 8.138 8.033 7.926 7.816 7.706 7.593 7.48 7.365 7.25 7.134 7.018 6.902 6.786 6.67 6.554 6.439 6.324 6.21 6.097 5.984 5.873 5.762 5.653 5.544 5.437 5.331 5.226 5.123 5.021 4.92 4.821 4.724 4.627 4.533 4.439 4.347 4.257 4.168 4.081 3.995 3.911 3.828 3.747 3.667 3.589 3.512 3.436 3.362 3.289 3.218 3.148 3.08 3.013 2.947 2.883 2.819 2.758 2.697 2.638 2.579 2.522 2.467 2.412 2.359 2.306 2.255 2.205 2.156 2.108 2.061 2.015 1.97 1.926 1.883 1.841 1.799 1.759 1.72 1.681 1.643 1.606 1.57 1.535 1.5 1.467 1.434 1.401 1.37

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.652" PeakHeight="110.0" Num="3" Error="0.0">
-24.218 5.802 -0.673
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.652" EndFrequency="9.25" PeakHeight="476.678" Num="5" zHalfNm="383.169" Error="6.402">
-270.047 -34.131 22.719 -14.968 6.999
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.25" Depth="0.332"/>
<TopsideChapman PeakHeight="476.678" PeakDensity="1061569.5" PeakScaleHeight="67.971" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
