<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-14 -073 16:30:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.03.14 (073) 16:30:00</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">
FF202607303141630009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="12.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.622" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.167" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" 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="3.333" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.334" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="354.615" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.621" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.901" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="114.648" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.955" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="63.702" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="146.400" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="157">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 275.000 280.000 285.000 285.000 290.000 295.000 295.000 300.000 301.000 302.000 303.000 304.000 305.000 305.000 305.000 306.667 308.333 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 337.500 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 352.500 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 377.500 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 390.000 392.500 395.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 406.667 408.333 410.000 415.000 415.000 415.000 410.000 410.000 412.500 415.000 416.250 417.500 418.750 420.000 425.000 428.333 431.667 435.000 435.000 437.500 440.000 441.667 443.333 445.000 450.000 450.000 455.000 460.000 460.000 460.000 465.000 470.000 475.000 477.500 480.000 485.000 485.000 490.000 493.543 497.458 501.807 506.665 512.129 518.319 525.389 533.543 543.050 554.276 567.736
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 45 0 51 45 48 48 45 51 0 0 0 0 48 48 45 0 0 54 54 0 54 57 54 57 57 54 0 54 57 57 57 57 54 57 0 57 57 57 60 60 60 57 54 57 60 60 60 60 0 60 60 57 63 60 63 60 57 66 63 66 63 57 0 66 63 60 69 69 66 63 66 66 66 63 0 66 63 0 66 69 57 66 0 63 66 63 0 63 66 63 63 0 0 54 57 60 63 63 60 60 63 63 63 60 63 60 0 0 57 45 0 54 0 42 0 57 0 0 0 0 51 0 0 48 51 0 51 0 0 54 51 54 54 48 54 51 54 54 48 0 54 48 54 54 51 51 54 51 51 51 48 48 48 45 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -2.734375 -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 -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 -2.734375 -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 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.492 90.0 95.0 100.0 105.0 110.0 111.785 113.569 115.0 115.354 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 354.615 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.242 2.885 3.224 3.333 3.21 3.21 3.309 3.333 3.488 3.637 3.778 3.915 4.05 4.184 4.319 4.455 4.594 4.736 4.882 5.032 5.186 5.346 5.511 5.682 5.86 6.044 6.234 6.432 6.637 6.849 7.068 7.293 7.525 7.763 8.005 8.253 8.504 8.759 9.016 9.275 9.536 9.797 10.059 10.32 10.579 10.837 11.091 11.34 11.583 11.816 12.035 12.234 12.406 12.539 12.624 12.65 12.65 12.641 12.618 12.582 12.532 12.47 12.397 12.314 12.221 12.118 12.007 11.889 11.763 11.631 11.493 11.35 11.202 11.05 10.895 10.736 10.575 10.411 10.246 10.079 9.911 9.742 9.573 9.403 9.234 9.064 8.896 8.728 8.561 8.395 8.23 8.067 7.906 7.746 7.587 7.431 7.276 7.124 6.974 6.825 6.679 6.535 6.394 6.254 6.117 5.983 5.85 5.72 5.593 5.467 5.344 5.224 5.105 4.989 4.875 4.764 4.654 4.547 4.443 4.34 4.239 4.141 4.044 3.95 3.858 3.768 3.679 3.593 3.508 3.426 3.345 3.266 3.189 3.113 3.04 2.967 2.897 2.828 2.761 2.695 2.631 2.568 2.507 2.447 2.388 2.331 2.276 2.221 2.168 2.116 2.065 2.016 1.967 1.92 1.874 1.829 1.785 1.742 1.7 1.659 1.619 1.58 1.542 1.505 1.468 1.433 1.399 1.365 1.332 1.3 1.268 1.238 1.208 1.179 1.15 1.122 1.095 1.069 1.043 1.018 0.993 0.969 0.946 0.923 0.901 0.879

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.333" PeakHeight="110.0" Num="3" Error="0.0">
-30.46 13.091 -3.139
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.333" EndFrequency="12.65" PeakHeight="354.615" Num="5" zHalfNm="268.621" Error="4.907">
-189.216 -59.232 8.716 -2.146 2.617
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.354" Depth="0.123"/>
<TopsideChapman PeakHeight="354.615" PeakDensity="1985390.9" PeakScaleHeight="63.702" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
