<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 23:00:00.000"
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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% 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</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) 23:00:00</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">
FF202603602052300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.722" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.998" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="7.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="447.034" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="397.059" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="340.565" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.444" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="83.268" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.094" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="42.387" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="85.760" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.760" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="91">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 350.000 350.000 350.000 350.000 350.000 350.000 342.500 335.000 350.000 360.000 365.000 366.667 368.333 370.000 372.500 375.000 375.000 375.000 379.000 383.000 387.000 391.000 395.000 395.000 395.000 392.500 390.000 387.500 385.000 385.000 385.000 385.000 380.000 380.000 375.000 375.000 377.500 380.000 382.500 385.000 387.500 390.000 392.500 395.000 397.500 400.000 400.000 400.000 400.000 400.000 400.000 405.000 405.625 406.250 406.875 407.500 408.125 408.750 409.375 410.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 415.000 420.000 427.500 435.000 435.000 437.539 440.357 443.502 447.034 451.029 455.584 460.828 466.928 474.113 482.700 493.144 506.121 522.679 544.539
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 0 63 0 0 51 57 57 0 51 60 0 54 0 0 0 54 0 0 0 0 48 48 51 51 54 0 57 0 57 0 57 57 54 54 0 60 0 0 0 54 0 57 0 57 57 0 0 0 57 60 54 54 57 54 0 0 57 60 54 0 57 54 54 0 0 0 57 0 51 54 54 0 60 57 60 54 0 60 54 51 54 51 51 57 51 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 2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 1.953125 0.390625 -0.390625 0.390625 1.953125 -1.953125 1.171875 -0.390625 1.171875 -0.390625 -0.390625 0.390625 2.734375 0.390625 1.171875 0.390625 -0.390625 0.390625 0.390625 -0.390625 1.171875 1.171875 1.171875 -1.171875 -2.734375 -1.171875 0.390625 1.953125 1.171875 1.171875 1.171875 0.390625 1.171875 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 0.390625 0.390625 -2.734375 1.953125 1.953125 1.171875 0.390625 1.953125 1.953125 1.171875 1.953125 1.171875 1.953125 1.953125 1.171875 1.953125 1.171875 1.953125 0.390625 1.171875 -0.390625 1.171875 1.171875 -0.390625 0.390625 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="181">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.379 145.0 150.0 155.0 160.0 165.0 170.0 175.0 176.758 180.0 185.0 190.0 195.0 200.0 205.0 210.0 210.137 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 397.059 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.329 0.308 0.278 0.237 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.238 0.261 0.284 0.307 0.33 0.353 0.354 0.419 0.498 0.591 0.698 0.82 0.954 1.102 1.262 1.434 1.617 1.812 2.018 2.235 2.463 2.702 2.952 3.212 3.482 3.763 4.053 4.351 4.658 4.971 5.291 5.614 5.938 6.262 6.582 6.893 7.192 7.473 7.73 7.958 8.148 8.296 8.397 8.445 8.45 8.446 8.422 8.378 8.315 8.236 8.142 8.034 7.914 7.784 7.646 7.499 7.346 7.188 7.026 6.861 6.693 6.524 6.354 6.184 6.014 5.845 5.678 5.512 5.348 5.187 5.028 4.873 4.72 4.57 4.424 4.281 4.141 4.005 3.873 3.744 3.618 3.496 3.378 3.263 3.151 3.043 2.938 2.837 2.738 2.643 2.551 2.461 2.375 2.291 2.211 2.133 2.057 1.984 1.914 1.846 1.78 1.717 1.656 1.596 1.539 1.484 1.431 1.38 1.33 1.283 1.237 1.192 1.149 1.108 1.068 1.03 0.993 0.957 0.922 0.889 0.857 0.826 0.796 0.768 0.74 0.713 0.688 0.663 0.639 0.616 0.593 0.572 0.551 0.531 0.512 0.494 0.476 0.459 0.442 0.426 0.411 0.396 0.382 0.368 0.354 0.342 0.329 0.317 0.306 0.295 0.284 0.274 0.264 0.254 0.245 0.236 0.228 0.22 0.212 0.204

</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="8.45" PeakHeight="397.059" Num="5" zHalfNm="340.565" Error="1.626">
-181.061 -12.001 8.684 -2.592 0.048
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="100.137" Depth="0.154"/>
<TopsideChapman PeakHeight="397.059" PeakDensity="885887.1" PeakScaleHeight="42.387" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
