<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-06 -065 23:40:00.000"
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="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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, 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" >
2026.03.06 (065) 23:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606503062340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.631" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.731" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="450.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="450.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="511.956" 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="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="455.421" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="420.888" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.673" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="56.773" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.552" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="25.429" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="84.850" 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="112">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
460.000 460.000 455.000 455.000 455.000 455.000 455.000 460.000 460.000 455.000 455.000 460.000 457.500 455.000 450.000 452.500 455.000 450.000 452.083 454.167 456.250 458.333 460.417 462.500 464.583 466.667 468.750 470.833 472.917 475.000 477.083 479.167 481.250 483.333 485.417 487.500 489.583 491.667 493.750 495.833 497.917 500.000 502.083 504.167 506.250 508.333 510.417 512.500 514.583 516.667 518.750 520.833 522.917 525.000 510.000 510.000 505.000 498.333 491.667 485.000 482.500 480.000 480.000 475.000 476.000 477.000 478.000 479.000 480.000 481.000 482.000 483.000 484.000 485.000 485.000 485.000 485.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 496.250 497.500 498.750 500.000 501.250 502.500 503.750 505.000 506.250 507.500 508.750 510.000 510.107 510.248 510.440 510.718 511.158 511.956 513.857 524.220
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 54 0 0 0 54 60 60 63 57 57 0 54 57 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 0 0 48 0 0 0 0 0 0 0 0 0 0 0 48 48 51 48 51 0 48 54 51 48 48 0 0 0 0 0 0 0 0 0 48 0 51 54 54 51 54 54 57 54 51 54 51 54 54 0 51 51 48 0 48 0 54 0 0 51 51 54 0 45 48 45 0 0 48 0 48 48 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 0.390625 0.390625 1.171875 0.390625 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 0.390625 -1.171875 -0.390625 -0.390625 -2.734375 0.390625 -1.953125 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 -1.171875 -0.390625 -1.171875 1.171875 2.734375 0.390625 -0.390625 1.953125 -0.390625 0.390625 -1.171875 1.171875 0.390625 -0.390625 1.953125 1.171875 1.953125 1.171875 -0.390625 -0.390625 2.734375 -0.390625 -2.734375 -1.171875 0.390625 -2.734375 2.734375 0.390625 -2.734375 1.953125 1.953125 -2.734375 0.390625 1.953125 0.390625 -2.734375 -1.171875 -1.953125 -2.734375 -1.953125 -2.734375 -1.171875 1.171875 -2.734375 -1.953125 1.171875 -0.390625 -0.390625 -2.734375 -2.734375 0.390625 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -0.390625 -1.953125 -0.390625 2.734375 -2.734375 -1.953125 -1.171875 -1.953125 -0.390625 -1.953125 -1.953125 0.390625 1.171875 -2.734375 0.390625 -1.953125 -2.734375 -1.171875 -1.953125 -2.734375 -2.734375 -0.390625 -2.734375 -2.734375 -1.171875 2.734375 0.390625 -1.171875 -2.734375 -1.171875 -1.171875 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="148">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.175 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.349 185.0 190.0 195.0 200.0 205.0 210.0 215.0 215.524 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 455.421 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.313 0.287 0.251 0.202 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.22 0.242 0.264 0.286 0.308 0.33 0.352 0.354 0.406 0.48 0.573 0.679 0.792 0.908 1.026 1.144 1.262 1.38 1.5 1.62 1.741 1.863 1.988 2.114 2.242 2.372 2.505 2.64 2.778 2.919 3.063 3.211 3.362 3.517 3.677 3.841 4.009 4.183 4.362 4.548 4.739 4.938 5.144 5.359 5.583 5.817 6.063 6.322 6.596 6.889 7.203 7.544 7.921 8.346 8.847 9.39 9.4 9.371 9.28 9.135 8.945 8.718 8.462 8.183 7.888 7.582 7.269 6.954 6.639 6.327 6.021 5.722 5.431 5.149 4.877 4.616 4.365 4.126 3.897 3.679 3.472 3.275 3.088 2.911 2.743 2.585 2.435 2.293 2.159 2.033 1.914 1.801 1.695 1.595 1.501 1.412 1.329 1.25 1.176 1.106 1.041 0.979 0.921 0.866 0.815 0.766 0.721 0.678 0.638 0.6 0.564 0.53 0.499 0.469 0.441 0.415 0.39 0.367 0.345 0.325 0.305 0.287 0.27 0.254 0.239 0.224 0.211

</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="9.4" PeakHeight="455.421" Num="5" zHalfNm="420.888" Error="4.035">
-187.725 -93.722 55.747 -14.404 0.207
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="105.524" Depth="0.154"/>
<TopsideChapman PeakHeight="455.421" PeakDensity="1096277.9" PeakScaleHeight="25.429" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
