<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-02 -033 02:00:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.02.02 (033) 02:00:00</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">
FF202603302020200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.041" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.893" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="341.923" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="330.611" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="257.202" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.604" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="102.384" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.514" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.136" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="80.450" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.380" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="87">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 270.000 270.000 275.000 270.000 265.000 260.000 257.500 255.000 255.000 255.000 255.000 250.000 245.000 245.000 247.500 250.000 250.000 250.000 250.000 250.000 251.250 252.500 253.750 255.000 265.000 270.000 275.000 267.500 260.000 265.000 260.000 265.000 270.000 270.000 280.000 275.000 270.000 275.000 272.500 270.000 270.000 275.000 280.000 280.000 277.500 275.000 285.000 290.000 290.000 290.000 295.000 295.000 295.000 297.500 300.000 305.000 310.000 310.000 305.000 308.077 311.154 314.231 317.308 320.385 323.462 326.538 329.615 332.692 335.769 338.846 341.923 345.000 350.940 357.445 364.597 372.500 381.278 391.084 402.110 414.601 428.866 445.316 464.491 487.132 514.269 547.393
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 63 60 0 0 57 0 57 0 60 60 69 69 69 66 69 75 69 0 66 0 0 0 0 60 54 57 0 66 66 54 0 66 69 60 0 66 72 0 72 66 63 63 69 0 69 66 63 57 51 72 66 66 66 63 66 69 69 63 0 60 66 0 0 66 63 63 60 0 0 0 57 54 54 54 57 0 51 48 48 48 54 0 0 48 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 -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 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -2.734375 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 -1.171875 -1.171875 -1.171875 -0.390625 0.390625 -0.390625 1.171875 0.390625 -0.390625 0.390625 -1.171875 0.390625 0.390625 -0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 -1.171875 2.734375 -1.171875 -0.390625 0.390625 1.171875 0.390625 -0.390625 -0.390625 0.390625 1.953125
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.5 145.0 150.0 155.0 160.0 165.0 170.0 173.0 175.0 180.0 185.0 190.0 195.0 200.0 204.5 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 330.611 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.326 0.302 0.268 0.219 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.234 0.259 0.283 0.308 0.332 0.354 0.373 0.502 0.617 0.741 0.884 1.061 1.298 1.661 2.469 4.083 4.856 5.342 5.701 5.986 6.22 6.416 6.581 6.721 6.839 6.937 7.018 7.084 7.134 7.17 7.192 7.2 7.2 7.196 7.181 7.156 7.122 7.08 7.029 6.971 6.906 6.834 6.757 6.675 6.589 6.498 6.404 6.306 6.206 6.104 5.999 5.893 5.786 5.678 5.569 5.46 5.35 5.241 5.131 5.023 4.915 4.807 4.701 4.595 4.491 4.388 4.286 4.185 4.086 3.989 3.893 3.798 3.705 3.614 3.525 3.437 3.351 3.267 3.184 3.103 3.024 2.947 2.871 2.797 2.724 2.654 2.584 2.517 2.451 2.387 2.324 2.262 2.203 2.144 2.087 2.032 1.977 1.925 1.873 1.823 1.774 1.727 1.68 1.635 1.591 1.548 1.506 1.465 1.426 1.387 1.35 1.313 1.277 1.243 1.209 1.176 1.144 1.113 1.083 1.053 1.025 0.997 0.97 0.943 0.917 0.892 0.868 0.844 0.821 0.799 0.777 0.756 0.735 0.715 0.695 0.676 0.658 0.64 0.622 0.605 0.589 0.573 0.557 0.542 0.527 0.512 0.498 0.485 0.471 0.458 0.446 0.434 0.422 0.41 0.399 0.388 0.377 0.367 0.357 0.347 0.338 0.328 0.319 0.311 0.302 0.294 0.286

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="7.2" PeakHeight="330.611" Num="5" zHalfNm="257.202" Error="2.319">
-166.183 65.642 -37.981 13.349 -0.938
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="94.5" Depth="0.154"/>
<TopsideChapman PeakHeight="330.611" PeakDensity="643176.2" PeakScaleHeight="56.136" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
