<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-26 -299 22:40:00.000"
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="14.0">
<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, F2o cusp not found, 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" >
2026.10.26 (299) 22:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629910262240009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.711" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.092" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="482.098" 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="6.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="404.659" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="354.605" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.086" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="75.214" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.469" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.235" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="82.840" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="77">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
435.000 430.000 432.500 435.000 430.000 428.333 426.667 425.000 420.000 415.000 415.000 410.000 408.704 407.407 406.111 404.815 403.519 402.222 400.926 399.630 398.333 397.037 395.741 394.444 393.148 391.852 390.556 389.259 387.963 386.667 385.370 384.074 382.778 381.481 380.185 378.889 377.593 376.296 375.000 385.000 390.000 402.000 414.000 426.000 438.000 450.000 435.000 450.000 450.000 450.000 454.000 458.000 462.000 466.000 470.000 465.000 460.000 455.000 456.250 457.500 458.750 460.000 461.250 462.500 463.750 465.000 466.250 467.500 468.750 470.000 475.000 476.667 478.852 482.098 487.426 497.787 526.682
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 0 63 63 0 0 57 63 69 69 63 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 63 57 57 0 0 0 0 57 60 57 0 57 0 0 0 0 51 0 0 54 0 0 0 0 0 0 0 0 0 0 54 54 0 0 0 54 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -1.953125 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 -1.953125 0.390625 0.390625 2.734375 1.171875 -1.171875 -1.171875 -1.171875 2.734375 -2.734375 -0.390625 -1.171875 -1.953125 -1.171875 -0.390625 2.734375 1.953125 -1.171875 -1.953125 -0.390625 -0.390625 0.390625 -1.171875 1.171875 -1.171875 2.734375 -0.390625 0.390625 2.734375 1.171875 1.171875 -0.390625 -2.734375 -0.390625 -1.171875 -0.390625 -1.953125 -1.171875 2.734375 -1.953125 -2.734375 1.171875 -0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="168">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.902 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.804 180.0 185.0 190.0 195.0 200.0 205.0 210.0 211.706 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 404.659 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0
</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 0.33 0.309 0.281 0.242 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.233 0.255 0.278 0.301 0.324 0.346 0.354 0.394 0.466 0.551 0.65 0.762 0.886 1.022 1.167 1.321 1.482 1.65 1.825 2.006 2.194 2.387 2.586 2.792 3.004 3.222 3.447 3.678 3.916 4.162 4.414 4.674 4.942 5.216 5.498 5.786 6.08 6.378 6.678 6.977 7.268 7.542 7.786 7.982 8.109 8.15 8.15 8.134 8.092 8.027 7.94 7.835 7.713 7.577 7.429 7.271 7.105 6.931 6.753 6.571 6.386 6.2 6.013 5.827 5.641 5.457 5.276 5.097 4.921 4.749 4.58 4.415 4.255 4.098 3.946 3.799 3.655 3.516 3.382 3.252 3.126 3.004 2.887 2.774 2.665 2.559 2.458 2.36 2.266 2.176 2.088 2.005 1.924 1.846 1.772 1.7 1.632 1.565 1.502 1.441 1.382 1.326 1.272 1.22 1.171 1.123 1.077 1.033 0.991 0.95 0.911 0.874 0.838 0.804 0.771 0.739 0.709 0.68 0.652 0.625 0.6 0.575 0.552 0.529 0.507 0.486 0.466 0.447 0.429 0.411 0.394 0.378 0.363 0.348 0.334 0.32 0.307 0.294 0.282 0.27 0.259 0.249 0.238 0.229 0.219 0.21 0.202

</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="8.15" PeakHeight="404.659" Num="5" zHalfNm="354.605" Error="4.339">
-175.77 -31.513 20.491 -6.889 0.728
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="101.706" Depth="0.154"/>
<TopsideChapman PeakHeight="404.659" PeakDensity="824100.5" PeakScaleHeight="37.235" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
