<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 15:30:00.000"
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" >
2026.03.13 (072) 15:30:00</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">
FF202607203131530009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.496" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.712" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.550" 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="3.403" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.366" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="355.281" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="235.113" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.453" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="153.295" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.593" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="85.364" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="197.400" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.320" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="84">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 325.000 326.250 327.500 328.750 330.000 330.000 335.000 336.111 337.222 338.333 339.444 340.556 341.667 342.778 343.889 345.000 350.000 352.500 355.000 357.500 360.000 360.000 360.000 360.000 365.000 370.000 371.667 373.333 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 440.000 440.000 445.000 450.000 455.000 455.000 460.000 465.000 470.000 470.000 480.000 480.000 485.000 485.000 495.000 495.000 500.000 500.000 510.000 510.000 515.000 525.000 530.000 535.000 545.000 550.000 555.000 560.000 571.250 582.500 593.750 608.636 626.612
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 45 0 48 45 45 0 51 0 48 0 0 0 0 48 51 0 48 0 45 51 54 51 0 45 0 0 48 54 48 57 48 57 51 60 57 60 60 54 63 60 57 63 60 63 63 63 60 63 60 60 60 63 60 60 57 60 60 60 57 57 57 54 51 57 57 54 51 54 51 51 51 51 45 51 48 48 45 45 45 42 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 -2.734375 -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 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</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" >
89.481 90.0 95.0 100.0 105.0 110.0 111.499 112.997 114.496 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 355.281 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.289 2.945 3.292 3.403 3.28 3.28 3.403 3.424 3.618 3.793 3.959 4.119 4.278 4.436 4.593 4.751 4.909 5.068 5.228 5.388 5.548 5.708 5.868 6.028 6.187 6.346 6.504 6.661 6.817 6.972 7.127 7.28 7.432 7.583 7.733 7.882 8.03 8.178 8.324 8.47 8.614 8.758 8.901 9.042 9.182 9.321 9.458 9.591 9.721 9.846 9.963 10.07 10.162 10.235 10.282 10.3 10.3 10.297 10.287 10.271 10.249 10.221 10.187 10.148 10.104 10.055 10.001 9.943 9.881 9.815 9.745 9.673 9.596 9.517 9.435 9.351 9.264 9.175 9.084 8.992 8.897 8.802 8.705 8.606 8.507 8.407 8.306 8.204 8.102 8.0 7.897 7.794 7.691 7.588 7.485 7.383 7.28 7.178 7.076 6.975 6.874 6.773 6.674 6.575 6.476 6.379 6.282 6.186 6.09 5.996 5.902 5.81 5.718 5.628 5.538 5.449 5.361 5.275 5.189 5.104 5.021 4.938 4.857 4.776 4.697 4.619 4.542 4.465 4.39 4.316 4.243 4.171 4.1 4.03 3.962 3.894 3.827 3.761 3.696 3.633 3.57 3.508 3.447 3.387 3.328 3.27 3.213 3.157 3.102 3.047 2.994 2.941 2.889 2.839 2.789 2.739 2.691 2.643 2.597 2.551 2.505 2.461 2.417 2.374 2.332 2.291 2.25 2.21 2.17 2.131 2.093 2.056 2.019 1.983 1.948 1.913 1.879 1.845 1.812 1.779 1.747 1.716 1.685 1.655 1.625 1.596

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.403" PeakHeight="110.0" Num="3" Error="0.0">
-30.509 13.164 -3.174
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.403" EndFrequency="10.3" PeakHeight="355.281" Num="5" zHalfNm="235.113" Error="3.896">
-211.119 -47.656 22.217 -6.129 1.902
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.496" Depth="0.123"/>
<TopsideChapman PeakHeight="355.281" PeakDensity="1316253.1" PeakScaleHeight="85.364" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
