<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-04 -063 22:40:00.000"
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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.04 (063) 22:40:00</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">
FF202606303042240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.396" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.883" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="515.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="515.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="593.624" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="523.939" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="488.082" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.300" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="57.644" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.906" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.162" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="100.180" 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="118">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
515.000 515.000 515.000 515.000 515.000 516.000 517.000 518.000 519.000 520.000 515.000 517.500 520.000 525.833 531.667 537.500 543.333 549.167 555.000 553.750 552.500 551.250 550.000 555.000 560.000 560.000 565.000 561.667 558.333 555.000 555.000 555.000 555.000 547.500 540.000 540.000 540.000 541.000 542.000 543.000 544.000 545.000 545.000 545.000 545.000 545.000 540.000 540.000 540.000 540.000 540.000 540.000 540.667 541.333 542.000 542.667 543.333 544.000 544.667 545.333 546.000 546.667 547.333 548.000 548.667 549.333 550.000 550.000 550.000 545.000 540.000 540.000 540.000 540.000 540.000 542.500 545.000 546.000 547.000 548.000 549.000 550.000 551.000 552.000 553.000 554.000 555.000 555.000 552.500 550.000 545.000 543.333 541.667 540.000 542.500 545.000 546.250 547.500 548.750 550.000 555.000 555.000 560.000 562.500 565.000 565.000 565.000 570.000 575.000 575.000 580.000 585.000 590.000 590.000 590.000 590.000 593.624 629.495
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 0 0 0 0 0 0 57 63 60 0 60 0 51 0 0 57 57 0 0 0 54 0 57 51 51 0 0 48 0 0 51 0 57 0 54 0 0 0 51 48 0 54 57 54 54 0 0 0 0 54 0 0 51 51 0 57 0 0 0 51 51 54 0 54 54 57 54 51 57 0 0 0 54 0 57 54 51 0 54 48 54 54 0 0 51 51 0 57 54 0 0 54 60 63 0 0 0 63 63 54 57 0 60 66 60 66 63 60 57 54 60 60 60 57 63 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 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 0.390625 -1.171875 -2.734375 -0.390625 -0.390625 -0.390625 -2.734375 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 2.734375 -0.390625 -1.171875 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 1.171875 -1.953125 0.390625 -1.953125 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.953125 -0.390625 -1.953125 -2.734375 -1.171875 -1.953125 -2.734375 0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.953125 -1.171875 -1.171875 -0.390625 -1.953125 -0.390625 -1.171875 -0.390625 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -1.171875 -1.171875 -0.390625 0.390625 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 1.171875 1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.953125 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="170">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.772 145.0 150.0 155.0 160.0 165.0 170.0 175.0 175.544 180.0 185.0 190.0 195.0 200.0 205.0 208.316 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 523.939 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.328 0.306 0.275 0.232 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.221 0.244 0.268 0.291 0.315 0.338 0.354 0.364 0.399 0.444 0.499 0.561 0.626 0.691 0.754 0.815 0.874 0.933 0.99 1.047 1.104 1.161 1.218 1.275 1.333 1.391 1.45 1.509 1.57 1.632 1.694 1.758 1.823 1.89 1.958 2.028 2.1 2.174 2.25 2.328 2.409 2.492 2.578 2.667 2.76 2.856 2.956 3.06 3.169 3.284 3.404 3.53 3.663 3.804 3.954 4.113 4.284 4.468 4.667 4.884 5.121 5.382 5.673 5.998 6.363 6.769 7.207 7.642 8.01 8.242 8.3 8.299 8.267 8.193 8.083 7.942 7.775 7.587 7.382 7.162 6.933 6.697 6.457 6.214 5.971 5.73 5.492 5.257 5.028 4.804 4.586 4.375 4.171 3.974 3.785 3.602 3.428 3.26 3.099 2.946 2.799 2.659 2.525 2.398 2.276 2.161 2.051 1.946 1.846 1.752 1.662 1.576 1.495 1.418 1.345 1.275 1.209 1.146 1.087 1.031 0.977 0.926 0.878 0.833 0.789 0.748 0.709 0.672 0.637 0.604 0.573 0.543 0.515 0.488 0.462 0.438 0.415 0.394 0.373 0.354 0.335 0.318 0.301 0.286 0.271 0.257 0.243 0.231 0.219 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.3" PeakHeight="523.939" Num="5" zHalfNm="488.082" Error="9.514">
-229.745 -127.327 39.845 11.139 -9.535
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="98.316" Depth="0.154"/>
<TopsideChapman PeakHeight="523.939" PeakDensity="854714.6" PeakScaleHeight="29.162" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
