<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 18:50:00.000"
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 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" >
2026.03.23 (082) 18:50:00</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">
FF202608203231850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.368" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.164" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="540.000" 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="2.799" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="400.767" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="282.709" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.583" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="155.857" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.346" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.376" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="193.070" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="150">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.6 3.65 3.7 3.75 3.8 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 220.000 220.000 224.000 228.000 232.000 236.000 240.000 245.000 247.857 250.714 253.571 256.429 259.286 262.143 265.000 270.000 270.000 270.000 275.000 275.000 280.000 280.000 280.000 280.000 285.000 290.000 285.000 290.000 295.000 296.429 297.857 299.286 300.714 302.143 303.571 305.000 305.000 310.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 335.000 335.000 335.000 340.000 341.875 343.750 345.625 347.500 349.375 351.250 353.125 355.000 355.000 355.000 360.000 365.000 365.000 365.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 470.000 475.000 475.000 475.000 480.000 480.000 482.500 485.000 487.500 490.000 492.500 495.000 497.500 500.000 500.000 500.000 505.000 505.000 505.000 510.000 510.000 515.000 520.000 520.000 525.000 525.000 530.000 532.500 535.000 540.000 540.000 540.000 550.000 550.000 555.000 560.000 565.000 570.000 575.000 580.000 585.000 590.000 600.000 605.000 612.500 623.171 635.584 650.205 667.678
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 54 54 0 0 51 0 51 48 0 54 0 0 57 0 57 63 63 0 66 66 66 69 69 66 0 48 63 63 51 0 0 0 0 0 0 63 60 0 0 54 63 66 63 66 63 69 66 0 66 66 0 0 63 0 54 0 0 66 66 48 0 69 66 60 69 66 69 63 69 63 66 60 66 60 66 60 69 63 69 63 57 66 60 69 63 69 66 66 69 66 69 69 66 60 66 63 69 63 69 66 57 66 69 66 69 60 69 54 66 0 0 0 54 63 69 60 63 66 66 63 63 54 60 54 60 60 51 60 54 57 57 54 51 54 54 51 51 48 48 48 48 45 45 0 45 42 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 -1.171875 -0.390625 -0.390625 1.953125 -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 -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 2.734375 -0.390625 -0.390625 -0.390625 -1.953125 -2.734375 -0.390625 -1.171875 2.734375 -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" >
89.582 90.0 95.0 100.0 105.0 110.0 114.135 115.0 118.269 120.0 122.404 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 400.767 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.881 2.423 2.708 2.799 2.677 2.677 2.677 2.728 2.799 2.861 2.981 3.105 3.233 3.365 3.502 3.644 3.79 3.941 4.096 4.256 4.419 4.584 4.752 4.922 5.093 5.264 5.435 5.606 5.776 5.945 6.114 6.281 6.446 6.611 6.774 6.936 7.096 7.256 7.415 7.572 7.729 7.885 8.04 8.195 8.349 8.503 8.657 8.81 8.964 9.117 9.27 9.423 9.576 9.729 9.881 10.032 10.183 10.331 10.476 10.615 10.745 10.861 10.956 11.022 11.049 11.05 11.047 11.037 11.02 10.995 10.964 10.927 10.884 10.835 10.781 10.721 10.657 10.588 10.514 10.437 10.356 10.272 10.184 10.093 9.999 9.903 9.805 9.704 9.601 9.497 9.391 9.284 9.175 9.066 8.955 8.844 8.732 8.62 8.507 8.394 8.281 8.168 8.055 7.942 7.829 7.717 7.605 7.493 7.383 7.272 7.163 7.054 6.946 6.838 6.732 6.627 6.522 6.419 6.316 6.214 6.114 6.015 5.916 5.819 5.723 5.628 5.535 5.442 5.351 5.261 5.172 5.084 4.997 4.912 4.828 4.745 4.663 4.582 4.503 4.424 4.347 4.271 4.196 4.123 4.05 3.979 3.909 3.839 3.771 3.704 3.639 3.574 3.51 3.447 3.386 3.325 3.265 3.207 3.149 3.092 3.036 2.982 2.928 2.875 2.823 2.772 2.721 2.672 2.623 2.576 2.529 2.483 2.437 2.393 2.349 2.306 2.264 2.223 2.182 2.142 2.103 2.065 2.027 1.99 1.953 1.917

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.799" PeakHeight="110.0" Num="3" Error="0.0">
-30.017 12.444 -2.845
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.799" EndFrequency="11.05" PeakHeight="400.767" Num="5" zHalfNm="282.709" Error="3.98">
-237.367 -61.068 29.501 -11.733 2.304
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.404" Depth="0.122"/>
<TopsideChapman PeakHeight="400.767" PeakDensity="1514919.4" PeakScaleHeight="83.376" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
