<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-26 -085 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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: 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" >
2026.03.26 (085) 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">
FF202608503262250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.626" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.004" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="430.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="430.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="506.984" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="456.083" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="421.179" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.182" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="56.169" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.074" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="26.522" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="85.230" 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="106">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
430.000 430.000 435.000 436.429 437.857 439.286 440.714 442.143 443.571 445.000 450.000 450.000 450.000 450.000 450.000 435.000 455.000 455.000 455.000 455.000 460.000 462.000 464.000 466.000 468.000 470.000 470.000 472.500 475.000 475.000 475.000 480.000 482.500 485.000 487.500 490.000 465.000 465.000 467.500 470.000 465.000 466.316 467.632 468.947 470.263 471.579 472.895 474.211 475.526 476.842 478.158 479.474 480.789 482.105 483.421 484.737 486.053 487.368 488.684 490.000 490.000 495.000 495.000 495.000 500.000 500.294 500.588 500.882 501.176 501.471 501.765 502.059 502.353 502.647 502.941 503.235 503.529 503.824 504.118 504.412 504.706 505.000 500.000 505.000 510.000 500.000 497.143 494.286 491.429 488.571 485.714 482.857 480.000 485.000 485.000 485.000 490.000 495.000 495.000 497.500 500.000 502.810 506.984 513.836 527.159 564.324
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 57 0 0 0 0 60 0 57 51 0 0 60 63 57 60 0 63 63 63 0 0 54 0 51 54 0 63 57 60 54 54 63 0 63 54 54 0 54 57 0 0 54 0 0 0 51 0 0 60 51 0 51 57 0 54 0 57 0 54 57 60 57 57 0 0 0 0 0 57 0 51 0 0 0 0 51 51 0 0 51 54 0 54 54 0 0 0 0 0 0 63 54 60 60 54 48 54 0 63 51 63 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 -0.390625 -0.390625 -0.390625 2.734375 1.953125 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -2.734375 -2.734375 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -2.734375 0.390625 -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 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 1.171875 -1.171875 -0.390625 -1.171875 2.734375 -1.171875 -1.171875 2.734375 1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -2.734375 -0.390625 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.171875 -1.171875 1.953125 1.953125 -2.734375 2.734375 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 1.953125 2.734375 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="149">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.671 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.343 180.0 185.0 190.0 195.0 200.0 205.0 210.0 211.014 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 456.083 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0
</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 0.326 0.349 0.354 0.393 0.456 0.533 0.618 0.705 0.793 0.881 0.967 1.054 1.14 1.227 1.315 1.404 1.494 1.585 1.678 1.773 1.87 1.969 2.071 2.175 2.282 2.393 2.507 2.624 2.745 2.871 3.001 3.135 3.275 3.421 3.573 3.731 3.897 4.07 4.253 4.444 4.647 4.861 5.089 5.332 5.593 5.873 6.177 6.509 6.872 7.27 7.686 7.987 8.0 7.983 7.918 7.809 7.663 7.486 7.285 7.064 6.828 6.582 6.329 6.073 5.815 5.559 5.306 5.058 4.815 4.579 4.35 4.13 3.917 3.713 3.517 3.33 3.152 2.981 2.819 2.665 2.519 2.379 2.248 2.122 2.004 1.892 1.786 1.685 1.59 1.501 1.416 1.336 1.26 1.188 1.121 1.057 0.997 0.94 0.887 0.836 0.789 0.744 0.701 0.661 0.623 0.588 0.554 0.523 0.493 0.465 0.438 0.413 0.389 0.367 0.346 0.326 0.308 0.29 0.274 0.258 0.243 0.229 0.216 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="8.0" PeakHeight="456.083" Num="5" zHalfNm="421.179" Error="4.752">
-187.609 -94.419 44.312 -4.769 -2.584
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="101.014" Depth="0.154"/>
<TopsideChapman PeakHeight="456.083" PeakDensity="794044.7" PeakScaleHeight="26.522" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
