<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-04 -063 00:40:00.000"
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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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) 00:40:00</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">
FF202606303040040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.810" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.432" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="8.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="426.823" 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="5.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="396.132" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="356.293" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.207" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="59.227" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.680" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="30.995" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="65.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.220" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="122">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
420.000 415.000 405.000 400.000 420.000 417.917 415.833 413.750 411.667 409.583 407.500 405.417 403.333 401.250 399.167 397.083 395.000 392.500 390.000 388.750 387.500 386.250 385.000 385.000 385.000 380.000 380.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 377.500 380.000 379.524 379.048 378.571 378.095 377.619 377.143 376.667 376.190 375.714 375.238 374.762 374.286 373.810 373.333 372.857 372.381 371.905 371.429 370.952 370.476 370.000 370.000 370.000 370.000 370.000 370.000 370.000 371.250 372.500 373.750 375.000 376.667 378.333 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 400.000 410.000 420.000 420.455 420.909 421.364 421.818 422.273 422.727 423.182 423.636 424.091 424.545 385.000 390.000 395.000 395.000 395.000 396.786 398.571 400.357 402.143 403.929 405.714 407.500 409.286 411.071 412.857 414.643 416.429 418.214 420.784 423.637 426.823 430.404 434.460 439.090 444.425 450.642 457.976 466.761 477.472 490.822 507.922
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 54 51 0 0 0 51 48 0 0 60 0 57 51 57 0 0 0 0 54 48 0 54 66 66 60 0 0 66 63 60 60 0 54 0 0 0 0 54 0 0 0 57 0 0 0 57 0 0 0 0 0 0 0 66 66 66 60 0 0 63 0 0 0 57 57 0 60 60 57 57 57 60 57 57 60 54 0 51 0 48 51 0 0 0 0 0 0 0 57 57 60 54 57 57 60 54 57 57 60 60 57 57 54 57 57 54 54 57 0 51 51 0 0 45 45 0 48 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 0.390625 -1.171875 0.390625 2.734375 -0.390625 1.171875 -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 -1.171875 0.390625 1.953125 -0.390625 0.390625 -0.390625 1.171875 -0.390625 2.734375 -0.390625 -1.171875 -1.171875 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.953125 1.953125 -0.390625 1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 0.390625 1.171875 -0.390625 -0.390625 -0.390625 2.734375 2.734375 0.390625 0.390625 -0.390625 2.734375 1.171875 1.953125 1.171875 -2.734375 1.171875 0.390625 1.953125 -0.390625 -1.171875 -1.171875 1.953125 -0.390625 -1.171875 1.171875 -1.171875 0.390625 0.390625 -1.171875 1.171875 1.171875 1.953125 -0.390625 -0.390625 -1.171875 0.390625 -0.390625 -1.953125 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="151">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.482 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.964 185.0 190.0 195.0 200.0 205.0 210.0 215.0 219.446 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 396.132 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0
</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 0.333 0.316 0.292 0.26 0.216 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.209 0.23 0.251 0.272 0.293 0.314 0.335 0.354 0.359 0.416 0.503 0.624 0.76 0.898 1.034 1.169 1.305 1.444 1.586 1.734 1.888 2.049 2.219 2.4 2.592 2.798 3.02 3.26 3.521 3.808 4.123 4.471 4.857 5.285 5.756 6.264 6.794 7.319 7.808 8.232 8.573 8.823 8.981 9.048 9.05 9.037 8.982 8.89 8.765 8.612 8.435 8.238 8.025 7.799 7.564 7.322 7.076 6.827 6.578 6.33 6.084 5.842 5.604 5.371 5.144 4.923 4.709 4.501 4.301 4.107 3.921 3.741 3.569 3.403 3.245 3.092 2.947 2.807 2.674 2.547 2.425 2.309 2.198 2.092 1.991 1.895 1.803 1.716 1.632 1.553 1.477 1.405 1.337 1.272 1.21 1.151 1.094 1.041 0.99 0.941 0.895 0.851 0.81 0.77 0.732 0.696 0.662 0.63 0.599 0.569 0.541 0.515 0.49 0.465 0.443 0.421 0.4 0.381 0.362 0.344 0.327 0.311 0.296 0.281 0.267 0.254 0.242 0.23 0.219 0.208

</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="9.05" PeakHeight="396.132" Num="5" zHalfNm="356.293" Error="7.327">
-155.275 -31.121 8.465 6.201 -4.956
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="109.446" Depth="0.154"/>
<TopsideChapman PeakHeight="396.132" PeakDensity="1016160.06" PeakScaleHeight="30.995" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
