<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-02 -061 15:50:00.000"
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: 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" >
2026.03.02 (061) 15:50:00</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">
FF202606103021550009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.739" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.348" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="10.000" 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="3.388" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.359" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="320.130" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="230.991" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.609" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="108.750" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.053" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.707" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="164.990" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="83">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 357.000 359.000 361.000 363.000 365.000 367.000 369.000 371.000 373.000 375.000 375.000 376.875 378.750 380.625 382.500 384.375 386.250 388.125 390.000 395.000 395.000 395.000 400.000 400.000 405.000 406.667 408.333 410.000 410.000 415.000 417.500 420.000 420.000 425.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 450.000 452.500 455.000 455.000 460.000 460.000 460.000 463.969 468.458 473.577 479.469 486.324 494.397 504.046
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 54 60 60 60 57 57 63 63 63 63 60 57 0 60 60 60 57 48 60 63 57 0 66 0 0 0 0 0 0 0 60 66 0 57 0 0 0 66 0 66 51 0 66 57 63 51 0 0 54 63 57 0 57 69 57 66 66 63 66 63 66 60 66 57 63 54 60 60 51 57 57 54 57 54 51 42 0 0 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 -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 -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 2.734375 -0.390625 -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" >
89.484 90.0 95.0 100.0 105.0 110.0 111.56 113.121 114.681 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 320.13 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.279 2.932 3.278 3.388 3.265 3.265 3.388 3.404 3.641 3.858 4.061 4.252 4.434 4.61 4.78 4.946 5.108 5.268 5.425 5.581 5.736 5.89 6.043 6.197 6.35 6.504 6.658 6.814 6.97 7.128 7.287 7.448 7.611 7.776 7.944 8.114 8.288 8.465 8.645 8.829 9.017 9.209 9.405 9.603 9.8 9.992 10.166 10.297 10.35 10.35 10.344 10.326 10.296 10.255 10.204 10.144 10.074 9.997 9.911 9.819 9.72 9.615 9.505 9.39 9.27 9.147 9.02 8.89 8.758 8.624 8.487 8.349 8.21 8.071 7.93 7.789 7.648 7.508 7.367 7.227 7.088 6.949 6.812 6.676 6.541 6.407 6.274 6.144 6.014 5.887 5.761 5.637 5.515 5.395 5.276 5.16 5.045 4.932 4.822 4.713 4.606 4.502 4.399 4.298 4.199 4.102 4.007 3.914 3.823 3.734 3.646 3.561 3.477 3.395 3.315 3.236 3.159 3.084 3.011 2.939 2.869 2.8 2.733 2.668 2.604 2.541 2.48 2.42 2.362 2.305 2.249 2.195 2.141 2.09 2.039 1.989 1.941 1.894 1.848 1.803 1.759 1.716 1.674 1.634 1.594 1.555 1.517 1.48 1.444 1.408 1.374 1.34 1.308 1.276 1.244 1.214 1.184 1.155 1.127 1.099 1.072 1.046 1.02 0.995 0.971 0.947 0.924 0.901 0.879 0.858 0.836 0.816 0.796 0.776 0.757 0.739 0.721 0.703 0.686 0.669 0.652 0.636 0.621 0.605 0.59 0.576

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.388" PeakHeight="110.0" Num="3" Error="0.0">
-30.499 13.149 -3.166
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.388" EndFrequency="10.35" PeakHeight="320.13" Num="5" zHalfNm="230.991" Error="2.669">
-164.517 -63.503 24.865 -2.03 -0.264
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.681" Depth="0.123"/>
<TopsideChapman PeakHeight="320.13" PeakDensity="1329063.2" PeakScaleHeight="62.707" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
