<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 12:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</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" >
2026.03.15 (074) 12:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607403151250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.004" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="35.896" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.750" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="395.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.206" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.274" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="318.852" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="279.721" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.262" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.100" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="55.310" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.566" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.679" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="66.970" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.610" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="128">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
565.000 568.000 571.000 574.000 577.000 580.000 580.000 585.000 586.667 588.333 590.000 591.667 593.333 595.000 595.000 595.000 595.000 300.000 300.000 300.833 301.667 302.500 303.333 304.167 305.000 305.000 306.667 308.333 310.000 310.000 312.500 315.000 315.000 315.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 326.667 328.333 330.000 330.000 330.000 330.833 331.667 332.500 333.333 334.167 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.833 346.667 347.500 348.333 349.167 350.000 350.833 351.667 352.500 353.333 354.167 355.000 355.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 367.500 370.000 370.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 381.000 382.000 383.000 384.000 385.000 385.000 385.000 385.000 395.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 400.000 402.676 405.830 409.602 414.193 419.904 427.199 436.844
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 51 0 0 48 45 45 0 0 0 0 0 45 54 0 48 51 48 0 48 0 57 0 54 48 0 0 45 54 0 66 0 57 66 63 66 66 66 69 69 66 0 0 69 0 72 0 0 0 0 0 72 72 75 69 69 72 72 66 66 69 75 75 0 0 0 0 0 0 0 0 0 0 0 66 69 60 0 0 69 75 75 0 75 72 69 0 75 57 57 63 66 66 63 48 57 57 57 57 57 51 45 48 0 0 42 0 51 51 51 0 42 54 51 54 48 54 0 51 54 57 54 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 -0.390625 1.953125 1.953125 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 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 -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 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 1.171875 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 115.000 115.000 113.750 112.500 111.250 110.000 110.000 110.000 115.000 112.500 110.000 110.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 48 0 0 0 54 54 57 48 0 48 48 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 -0.390625 -1.953125 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -2.734375 -0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="159">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.512 90.0 95.0 100.0 105.0 110.0 112.316 114.631 115.0 116.947 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 318.852 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.156 2.775 3.102 3.206 3.084 3.084 3.103 3.206 3.477 3.655 3.794 3.916 4.03 4.138 4.243 4.347 4.449 4.551 4.653 4.755 4.859 4.965 5.072 5.182 5.295 5.412 5.532 5.657 5.787 5.924 6.067 6.218 6.379 6.552 6.739 6.942 7.167 7.42 7.71 8.053 8.476 9.03 9.784 10.633 11.241 11.606 11.819 11.926 11.95 11.949 11.918 11.849 11.745 11.61 11.447 11.26 11.053 10.828 10.589 10.338 10.077 9.81 9.537 9.261 8.983 8.705 8.428 8.153 7.881 7.612 7.348 7.089 6.835 6.587 6.345 6.11 5.88 5.658 5.442 5.233 5.03 4.834 4.645 4.462 4.285 4.115 3.95 3.792 3.64 3.493 3.352 3.216 3.085 2.96 2.839 2.723 2.611 2.504 2.401 2.303 2.208 2.117 2.03 1.946 1.865 1.788 1.714 1.643 1.575 1.51 1.447 1.387 1.33 1.274 1.221 1.171 1.122 1.075 1.031 0.988 0.947 0.907 0.87 0.833 0.799 0.765 0.734 0.703 0.674 0.646 0.619 0.593 0.568 0.545 0.522 0.5 0.479 0.459 0.44 0.422 0.404 0.387 0.371 0.356 0.341 0.327 0.313 0.3 0.288 0.276 0.264 0.253 0.242 0.232 0.223 0.213 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.206" PeakHeight="110.0" Num="3" Error="0.0">
-30.362 12.947 -3.073
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.206" EndFrequency="11.95" PeakHeight="318.852" Num="5" zHalfNm="279.721" Error="26.119">
-136.233 -70.296 -15.259 18.802 1.081
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.947" Depth="0.122"/>
<TopsideChapman PeakHeight="318.852" PeakDensity="1771743.1" PeakScaleHeight="36.679" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
