<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 22:50:00.000"
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 55 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 0% PACIFIC flags: F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, 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" >
2026.03.25 (084) 22:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608403252250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="23" >
<URSI ID="00" Val="8.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.661" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.951" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="435.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="435.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="446.399" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="406.270" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.182" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="63.333" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.857" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="30.126" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="84.840" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
440.000 442.500 445.000 440.000 440.000 450.000 445.000 445.000 445.000 435.000 445.000 441.667 438.333 435.000 436.471 437.941 439.412 440.882 442.353 443.824 445.294 446.765 448.235 449.706 451.176 452.647 454.118 455.588 457.059 458.529 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 460.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 470.000 471.111 472.222 473.333 474.444 475.556 476.667 477.778 478.889 480.000 481.111 482.222 483.333 484.444 485.556 486.667 487.778 488.889 490.000 490.000 490.000 490.000 490.000 485.000 500.000 500.000 497.500 495.000 505.000 505.000 505.000 505.000 505.000 495.000 490.000 485.000 515.000 515.000 515.000 520.000 527.060
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 0 69 0 54 60 54 63 60 69 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 69 0 0 0 66 0 69 0 57 60 54 69 0 63 66 63 63 66 63 63 63 60 57 63 66 66 63 0 0 0 0 57 0 0 0 0 57 0 0 0 0 54 54 60 60 0 0 63 0 57 66 0 0 57 54 60 60 0 60 63 63 54 60 63 63 0 60 60 60 72 69 60
</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 -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 -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 1.171875 -1.171875 2.734375 -0.390625 -0.390625 -2.734375 0.390625 0.390625 0.390625 -1.953125 0.390625 -1.171875 -1.171875 0.390625 0.390625 -0.390625 -0.390625 1.171875 0.390625 0.390625 -1.953125 -0.390625 -0.390625 2.734375 0.390625 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="157">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.656 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.311 180.0 185.0 190.0 195.0 200.0 205.0 210.0 210.967 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 446.399 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0
</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 0.309 0.28 0.24 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.212 0.235 0.258 0.281 0.304 0.327 0.35 0.354 0.397 0.464 0.547 0.641 0.74 0.841 0.942 1.044 1.145 1.248 1.351 1.456 1.562 1.67 1.78 1.892 2.007 2.125 2.245 2.369 2.496 2.626 2.761 2.899 3.043 3.191 3.344 3.502 3.667 3.838 4.015 4.2 4.393 4.595 4.806 5.028 5.261 5.506 5.765 6.04 6.332 6.643 6.973 7.323 7.684 8.024 8.237 8.25 8.239 8.188 8.102 7.983 7.838 7.67 7.483 7.281 7.068 6.846 6.618 6.386 6.152 5.919 5.687 5.457 5.232 5.011 4.795 4.585 4.381 4.183 3.993 3.809 3.631 3.461 3.297 3.14 2.99 2.846 2.708 2.576 2.451 2.331 2.216 2.107 2.003 1.904 1.809 1.719 1.634 1.552 1.475 1.401 1.331 1.264 1.201 1.141 1.083 1.029 0.977 0.928 0.881 0.837 0.795 0.755 0.717 0.681 0.646 0.614 0.583 0.553 0.525 0.499 0.474 0.45 0.427 0.406 0.385 0.366 0.347 0.33 0.313 0.297 0.282 0.268 0.254 0.241 0.229 0.218 0.207

</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="8.25" PeakHeight="446.399" Num="5" zHalfNm="406.27" Error="3.638">
-189.602 -78.88 41.77 -7.272 -1.448
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="100.967" Depth="0.154"/>
<TopsideChapman PeakHeight="446.399" PeakDensity="844447.9" PeakScaleHeight="30.126" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
