<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-08 -067 23:00:00.000"
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, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.03.08 (067) 23:00:00</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">
FF202606703082300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.527" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.597" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="500.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="500.000" 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="7.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="450.576" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="378.672" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.066" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="106.328" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="18.934" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.361" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="110.030" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.740" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="36">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
525.000 525.000 522.500 520.000 520.000 518.333 516.667 515.000 510.000 512.500 515.000 515.000 515.000 515.000 515.000 515.000 514.545 514.091 513.636 513.182 512.727 512.273 511.818 511.364 510.909 500.000 510.000 515.000 525.000 550.000 556.667 564.349 573.793 585.686 601.121 621.956
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 57 57 57 51 54 54 66 57 0 60 57 57 0 0 57 0 0 0 0 0 0 0 0 0 51 51 48 48 51 0 0 48 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.171875 -1.171875 -1.953125 -1.171875 -2.734375 -1.953125 -1.171875 -1.171875 -1.171875 -0.390625 0.390625 -0.390625 0.390625 0.390625 -1.953125 -1.171875 1.953125 2.734375 -2.734375 -2.734375 -1.171875 0.390625 -1.953125 2.734375 -1.171875 -2.734375 -1.171875 -1.953125 -0.390625 -0.390625 -1.171875 -2.734375 0.390625 1.953125 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.809 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.617 180.0 185.0 190.0 195.0 200.0 205.0 210.0 211.426 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 450.576 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.329 0.309 0.28 0.241 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.234 0.256 0.279 0.302 0.325 0.348 0.354 0.4 0.461 0.524 0.591 0.662 0.74 0.826 0.92 1.024 1.138 1.261 1.396 1.54 1.694 1.857 2.028 2.207 2.391 2.581 2.777 2.976 3.18 3.387 3.597 3.81 4.026 4.245 4.466 4.688 4.913 5.139 5.367 5.595 5.824 6.052 6.279 6.504 6.725 6.941 7.149 7.348 7.534 7.703 7.851 7.974 8.067 8.127 8.15 8.15 8.145 8.126 8.095 8.053 7.999 7.936 7.864 7.784 7.696 7.601 7.501 7.394 7.284 7.169 7.05 6.929 6.805 6.679 6.551 6.422 6.292 6.162 6.032 5.901 5.771 5.642 5.514 5.386 5.26 5.135 5.011 4.89 4.769 4.651 4.534 4.42 4.307 4.197 4.088 3.982 3.878 3.776 3.676 3.578 3.482 3.389 3.297 3.208 3.121 3.036 2.952 2.871 2.792 2.715 2.64 2.567 2.495 2.426 2.358 2.292 2.228 2.165 2.104 2.045 1.988 1.931 1.877 1.824 1.772 1.722 1.673 1.625 1.579 1.534 1.49 1.448 1.407 1.366 1.327 1.289 1.253 1.217 1.182 1.148 1.115 1.083 1.052 1.022 0.993 0.964 0.936 0.91 0.883 0.858 0.833 0.809 0.786 0.764 0.742 0.72 0.699 0.679 0.66 0.641 0.622 0.604 0.587 0.57 0.554 0.538

</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="8.15" PeakHeight="450.576" Num="5" zHalfNm="378.672" Error="4.971">
-229.228 -20.157 14.715 -7.382 2.902
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="101.426" Depth="0.154"/>
<TopsideChapman PeakHeight="450.576" PeakDensity="824100.5" PeakScaleHeight="53.361" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
