<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 01:40:00.000"
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 22 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Severe F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.03.19 (078) 01:40:00</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">
FF202607803190140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.835" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.521" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="360.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.650" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="380.781" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="332.120" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.647" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="71.839" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.403" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.128" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="73.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.790" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="48">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 380.000 370.000 370.000 366.667 363.333 360.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 370.000 370.000 375.000 375.000 385.000 389.167 393.333 397.500 401.667 405.833 410.000 414.167 418.333 422.500 426.667 430.833 435.000 445.000 505.000 491.667 478.333 465.000 465.000 464.545 464.091 463.636 463.182 462.727 462.273 461.818 461.364 460.909 460.455 460.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 54 57 54 0 54 57 51 57 54 54 57 51 57 54 57 48 51 51 0 0 0 0 0 0 0 0 0 0 51 48 51 0 48 0 54 51 0 0 48 48 48 48 0 48 0 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 1.171875 -0.390625 -0.390625 1.171875 -2.734375 1.171875 -1.953125 1.953125 -1.171875 -2.734375 1.171875 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="161">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.328 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.657 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 221.985 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 380.781 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.334 0.318 0.295 0.265 0.224 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.222 0.243 0.263 0.284 0.305 0.325 0.346 0.354 0.421 0.521 0.625 0.742 0.874 1.028 1.206 1.41 1.641 1.897 2.177 2.475 2.788 3.114 3.45 3.794 4.144 4.5 4.861 5.226 5.593 5.961 6.328 6.691 7.046 7.389 7.712 8.007 8.261 8.461 8.594 8.649 8.65 8.639 8.598 8.53 8.438 8.325 8.192 8.044 7.882 7.709 7.527 7.337 7.141 6.941 6.739 6.535 6.33 6.126 5.924 5.724 5.526 5.332 5.141 4.954 4.772 4.594 4.421 4.253 4.089 3.931 3.777 3.629 3.485 3.346 3.213 3.083 2.959 2.839 2.723 2.612 2.505 2.402 2.304 2.209 2.117 2.029 1.945 1.864 1.787 1.712 1.641 1.572 1.506 1.443 1.383 1.325 1.269 1.216 1.165 1.116 1.069 1.024 0.981 0.939 0.9 0.862 0.825 0.791 0.757 0.725 0.695 0.665 0.637 0.61 0.585 0.56 0.536 0.513 0.492 0.471 0.451 0.432 0.414 0.396 0.379 0.363 0.348 0.333 0.319 0.306 0.293 0.28 0.269 0.257 0.246 0.236 0.226 0.216 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="8.65" PeakHeight="380.781" Num="5" zHalfNm="332.12" Error="5.492">
-154.255 -10.773 8.58 -4.529 2.181
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="111.985" Depth="0.154"/>
<TopsideChapman PeakHeight="380.781" PeakDensity="928318.9" PeakScaleHeight="36.128" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
