<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 19:40:00.000"
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" >
2026.03.07 (066) 19:40:00</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">
FF202606603071940009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.543" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.497" 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="11.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="10.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" 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="2.475" 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="372.596" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="277.514" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.692" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="129.594" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.057" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.519" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.990" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="161">
<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 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 245.000 245.000 247.222 249.444 251.667 253.889 256.111 258.333 260.556 262.778 265.000 265.000 265.000 270.000 270.000 270.000 275.000 276.667 278.333 280.000 280.000 285.000 286.667 288.333 290.000 290.000 290.000 290.000 290.000 290.000 295.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 310.000 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 327.500 330.000 330.000 330.000 333.000 336.000 339.000 342.000 345.000 345.000 346.667 348.333 350.000 350.000 351.667 353.333 355.000 355.000 355.000 355.000 355.000 355.000 360.000 365.000 365.000 365.000 367.500 370.000 370.000 372.500 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 407.500 410.000 410.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 422.500 425.000 425.000 430.000 430.000 430.000 432.500 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 452.500 455.000 455.000 460.000 465.000 465.000 465.000 470.000 475.000 475.000 480.000 480.000 485.000 485.000 495.000 495.000 500.000 505.000 510.000 515.000 515.000 522.500 530.000 530.000 537.500 544.777 552.960 562.229 572.816 585.023 599.253
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 63 60 57 0 54 0 0 0 0 0 0 51 0 63 48 0 63 57 0 0 60 66 63 0 0 57 63 0 60 0 54 72 63 66 0 0 54 66 0 57 51 69 60 72 72 0 69 72 75 78 75 69 57 69 66 69 0 69 0 72 0 0 0 0 57 57 0 0 0 63 0 0 60 66 69 69 72 69 0 60 66 66 57 66 69 57 63 63 66 60 63 54 0 69 69 63 69 60 66 69 60 63 54 0 51 63 66 69 69 66 66 60 66 54 60 66 57 63 60 0 63 63 60 57 60 60 54 57 0 48 57 60 51 51 60 63 63 66 63 63 63 60 54 57 57 54 51 48 48 0 42 45 48 0 0 54 54 54 42
</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 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 -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 -0.390625 -0.390625 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 -1.171875 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 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" >
89.645 90.0 95.0 100.0 105.0 110.0 115.0 115.709 120.0 121.417 125.0 127.126 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 372.596 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.23 1.662 2.143 2.395 2.475 2.379 2.35 2.35 2.35 2.428 2.475 2.552 2.682 2.813 2.944 3.079 3.217 3.361 3.51 3.666 3.829 3.999 4.177 4.362 4.556 4.756 4.963 5.175 5.393 5.614 5.838 6.064 6.291 6.519 6.746 6.973 7.199 7.424 7.648 7.871 8.092 8.312 8.53 8.747 8.963 9.178 9.391 9.603 9.813 10.021 10.227 10.43 10.628 10.82 11.003 11.173 11.325 11.451 11.544 11.593 11.6 11.599 11.587 11.564 11.531 11.487 11.434 11.372 11.302 11.223 11.138 11.045 10.946 10.842 10.732 10.617 10.498 10.375 10.248 10.118 9.985 9.85 9.713 9.574 9.433 9.291 9.148 9.004 8.86 8.716 8.571 8.427 8.283 8.139 7.996 7.853 7.712 7.572 7.432 7.294 7.157 7.021 6.887 6.755 6.624 6.494 6.366 6.24 6.116 5.993 5.873 5.754 5.636 5.521 5.408 5.296 5.186 5.078 4.972 4.868 4.766 4.665 4.566 4.469 4.374 4.281 4.189 4.1 4.011 3.925 3.84 3.757 3.676 3.596 3.518 3.441 3.366 3.293 3.221 3.15 3.081 3.013 2.947 2.882 2.819 2.756 2.695 2.636 2.578 2.521 2.465 2.41 2.357 2.304 2.253 2.203 2.154 2.106 2.059 2.013 1.968 1.924 1.881 1.839 1.798 1.758 1.719 1.68 1.643 1.606 1.57 1.535 1.5 1.467 1.434 1.402 1.37 1.34 1.309 1.28 1.251 1.223 1.196 1.169 1.143 1.117 1.092

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.475" PeakHeight="110.0" Num="3" Error="0.0">
-29.687 11.972 -2.64
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.475" EndFrequency="11.6" PeakHeight="372.596" Num="5" zHalfNm="277.514" Error="4.482">
-209.721 -47.228 17.121 -8.5 2.858
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.126" Depth="0.125"/>
<TopsideChapman PeakHeight="372.596" PeakDensity="1669478.9" PeakScaleHeight="68.519" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
