<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 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: 100%</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" >
2026.03.30 (089) 16:30:00</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">
FF202608903301630009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.474" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.944" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="545.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.317" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.326" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="373.586" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.687" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.904" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="135.040" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.233" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="74.868" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="184.330" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.120" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="124">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 287.500 290.000 292.500 295.000 297.500 300.000 303.750 307.500 311.250 315.000 315.000 320.000 323.333 326.667 330.000 330.000 332.500 335.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 382.500 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 445.000 447.500 450.000 450.000 450.000 455.000 455.000 455.000 460.000 460.000 460.000 465.000 465.000 465.000 467.500 470.000 470.000 472.500 475.000 475.000 480.000 481.667 483.333 485.000 485.000 487.500 490.000 495.000 495.000 495.000 500.000 505.000 505.000 507.500 510.000 515.000 520.000 525.000 525.000 530.000 535.000 540.000 542.500 545.000 545.000 550.329 556.472 563.630 572.076 582.194 594.535 609.921
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 0 0 0 0 51 0 48 0 51 48 51 0 0 48 54 0 54 57 57 57 54 60 60 63 63 60 63 63 60 63 63 0 60 60 54 60 57 60 60 60 60 57 0 57 60 60 63 63 63 66 60 51 60 63 57 60 57 60 54 60 57 60 54 63 60 60 51 60 51 57 57 51 60 60 54 54 0 57 57 0 57 57 0 57 0 57 57 0 54 57 51 0 0 54 54 0 51 48 51 51 0 48 48 0 45 48 48 45 51 48 0 42 0 48 48 45 45 45 48 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 -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 -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 -1.171875 -1.953125 1.171875 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -2.734375 -2.734375 2.734375 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 1.171875 -2.734375 -1.953125
</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" >
89.494 90.0 95.0 100.0 105.0 110.0 111.853 113.706 115.0 115.559 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.586 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.231 2.871 3.209 3.317 3.194 3.194 3.28 3.317 3.478 3.646 3.806 3.962 4.116 4.268 4.42 4.573 4.725 4.879 5.033 5.188 5.344 5.502 5.66 5.82 5.98 6.142 6.304 6.468 6.632 6.797 6.963 7.13 7.298 7.466 7.635 7.805 7.975 8.146 8.318 8.491 8.665 8.84 9.016 9.193 9.371 9.55 9.73 9.911 10.094 10.277 10.461 10.645 10.827 11.008 11.182 11.347 11.494 11.611 11.684 11.7 11.7 11.692 11.674 11.648 11.612 11.568 11.517 11.458 11.392 11.319 11.24 11.155 11.065 10.97 10.87 10.766 10.659 10.547 10.432 10.315 10.195 10.072 9.947 9.821 9.692 9.563 9.432 9.301 9.168 9.036 8.902 8.769 8.636 8.502 8.369 8.237 8.104 7.973 7.842 7.712 7.582 7.454 7.327 7.201 7.076 6.952 6.829 6.708 6.588 6.47 6.353 6.237 6.123 6.01 5.899 5.79 5.682 5.575 5.47 5.367 5.265 5.165 5.066 4.969 4.874 4.78 4.687 4.596 4.507 4.419 4.333 4.248 4.164 4.082 4.002 3.923 3.845 3.769 3.694 3.621 3.549 3.478 3.408 3.34 3.273 3.208 3.143 3.08 3.018 2.957 2.897 2.839 2.782 2.725 2.67 2.616 2.563 2.511 2.46 2.41 2.361 2.313 2.266 2.22 2.174 2.13 2.087 2.044 2.002 1.961 1.921 1.882 1.843 1.806 1.769 1.732 1.697 1.662 1.628 1.595 1.562 1.53 1.499 1.468 1.438 1.408

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.317" PeakHeight="110.0" Num="3" Error="0.0">
-30.448 13.073 -3.131
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.317" EndFrequency="11.7" PeakHeight="373.586" Num="5" zHalfNm="268.687" Error="2.127">
-210.261 -69.757 25.876 -5.429 1.544
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.559" Depth="0.123"/>
<TopsideChapman PeakHeight="373.586" PeakDensity="1698387.1" PeakScaleHeight="74.868" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
