<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 21:50:00.000"
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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2o cusp, F2 cusps do not match</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" >
2026.03.27 (086) 21:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608603272150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.648" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.396" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="496.841" 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="0.384" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="415.697" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="367.064" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.939" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="73.417" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.382" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.222" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="81.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.350" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="178">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.25 2.3 2.35 2.4 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 335.000 335.000 335.000 335.000 335.000 335.000 336.111 337.222 338.333 339.444 340.556 341.667 342.778 343.889 345.000 345.000 345.000 345.385 345.769 346.154 346.538 346.923 347.308 347.692 348.077 348.462 348.846 349.231 349.615 350.000 350.000 351.000 352.000 353.000 354.000 355.000 355.000 355.000 355.000 357.000 359.000 361.000 363.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 366.667 368.333 370.000 370.000 371.667 373.333 375.000 375.000 372.500 370.000 375.000 375.000 375.000 375.000 375.000 375.000 376.667 378.333 380.000 382.500 385.000 385.000 385.000 385.000 387.500 390.000 391.000 392.000 393.000 394.000 395.000 390.000 392.500 395.000 395.833 396.667 397.500 398.333 399.167 400.000 395.000 400.000 405.000 405.000 405.000 407.500 410.000 407.500 405.000 410.000 410.000 410.000 411.667 413.333 415.000 416.667 418.333 420.000 420.000 420.000 420.000 420.000 420.000 420.000 422.500 425.000 425.000 425.000 427.500 430.000 430.000 430.000 432.500 435.000 436.250 437.500 438.750 440.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 447.500 450.000 450.000 450.000 450.000 455.000 455.000 455.000 455.000 460.000 460.000 460.000 460.000 460.000 465.000 465.000 465.000 465.000 465.000 466.250 467.500 468.750 470.000 480.000 480.000 480.000 480.000 485.000 485.000 485.000 485.000 486.361 487.901 489.661 491.689 494.052 496.841 500.183 504.259 509.341 515.856 524.506
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 66 66 66 0 0 69 0 0 0 0 0 0 0 0 69 69 72 0 0 0 0 0 0 0 0 0 0 60 0 0 63 0 0 0 0 63 63 69 69 0 54 0 0 0 66 0 0 51 69 0 0 0 66 69 51 0 57 63 0 66 69 0 69 72 0 66 0 54 72 0 66 0 72 75 0 63 0 0 0 0 54 0 0 66 48 69 0 60 0 66 0 0 60 0 66 0 54 0 72 69 69 69 0 0 0 69 0 60 60 66 66 72 0 72 0 66 51 69 0 63 0 66 57 60 0 0 0 57 63 69 69 69 63 63 69 54 60 0 69 66 57 60 0 69 57 60 66 0 63 63 0 63 66 63 0 0 0 0 51 57 60 60 54 57 57 0 0 0 51 45 51 0 48 45 45 0 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 -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 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 0.390625 1.953125 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="174">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.927 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.551 140.0 145.0 150.0 155.0 160.0 165.0 169.103 170.0 175.0 180.0 185.0 190.0 195.0 198.654 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 415.697 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.254 0.333 0.372 0.384 0.38 0.368 0.346 0.313 0.265 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.237 0.268 0.299 0.33 0.361 0.384 0.415 0.506 0.588 0.671 0.756 0.846 0.943 1.047 1.159 1.281 1.412 1.553 1.706 1.87 2.046 2.234 2.435 2.648 2.873 3.111 3.361 3.623 3.898 4.184 4.482 4.791 5.113 5.446 5.79 6.147 6.514 6.893 7.282 7.681 8.09 8.505 8.925 9.345 9.758 10.152 10.509 10.807 11.013 11.099 11.1 11.085 11.032 10.945 10.827 10.682 10.513 10.323 10.116 9.894 9.66 9.417 9.167 8.911 8.652 8.391 8.13 7.869 7.61 7.353 7.1 6.851 6.607 6.368 6.134 5.906 5.684 5.468 5.259 5.056 4.859 4.668 4.484 4.306 4.135 3.969 3.809 3.655 3.507 3.364 3.227 3.095 2.967 2.845 2.728 2.615 2.507 2.403 2.303 2.208 2.116 2.027 1.943 1.862 1.784 1.709 1.638 1.569 1.503 1.44 1.38 1.322 1.266 1.213 1.162 1.113 1.066 1.021 0.978 0.937 0.898 0.86 0.824 0.789 0.756 0.724 0.693 0.664 0.636 0.609 0.584 0.559 0.535 0.513 0.491 0.47 0.451 0.432 0.413 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="0.384" PeakHeight="110.0" Num="3" Error="0.0">
-19.764 2.883 -0.192
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.384" EndFrequency="11.1" PeakHeight="415.697" Num="5" zHalfNm="367.064" Error="3.895">
-188.631 -45.469 19.244 -4.738 2.551
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="88.654" Depth="0.184"/>
<TopsideChapman PeakHeight="415.697" PeakDensity="1528660.0" PeakScaleHeight="36.222" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
